21240072

素因数分解:

$2^3\times 3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:140

約数の個数: 192

約数和(自身を含む): 72558720

約数和(自身を除く): 51318648

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 17, 18, 21, 24, 28, 34, 36, 37, 42, 51, 56, 63, 67, 68, 72, 74, 84, 102, 111, 119, 126, 134, 136, 148, 153, 168, 201, 204, 222, 238, 252, 259, 268, 296, 306, 333, 357, 402, 408, 444, 469, 476, 504, 518, 536, 603, 612, 629, 666, 714, 777, 804, 888, 938, 952, 1036, 1071, 1139, 1206, 1224, 1258, 1332, 1407, 1428, 1554, 1608, 1876, 1887, 2072, 2142, 2278, 2331, 2412, 2479, 2516, 2664, 2814, 2856, 3108, 3417, 3752, 3774, 4221, 4284, 4403, 4556, 4662, 4824, 4958, 5032, 5628, 5661, 6216, 6834, 7437, 7548, 7973, 8442, 8568, 8806, 9112, 9324, 9916, 10251, 11256, 11322, 13209, 13668, 14874, 15096, 15946, 16884, 17353, 17612, 18648, 19832, 20502, 22311, 22644, 23919, 26418, 27336, 29748, 31892, 33768, 34706, 35224, 39627, 41004, 42143, 44622, 45288, 47838, 52059, 52836, 59496, 63784, 69412, 71757, 79254, 82008, 84286, 89244, 95676, 104118, 105672, 126429, 138824, 143514, 156177, 158508, 168572, 178488, 191352, 208236, 252858, 287028, 295001, 312354, 317016, 337144, 379287, 416472, 505716, 574056, 590002, 624708, 758574, 885003, 1011432, 1180004, 1249416, 1517148, 1770006, 2360008, 2655009, 3034296, 3540012, 5310018, 7080024, 10620036, 21240072]

約数ペア:

[(1, 21240072), (2, 10620036), (3, 7080024), (4, 5310018), (6, 3540012), (7, 3034296), (8, 2655009), (9, 2360008), (12, 1770006), (14, 1517148), (17, 1249416), (18, 1180004), (21, 1011432), (24, 885003), (28, 758574), (34, 624708), (36, 590002), (37, 574056), (42, 505716), (51, 416472), (56, 379287), (63, 337144), (67, 317016), (68, 312354), (72, 295001), (74, 287028), (84, 252858), (102, 208236), (111, 191352), (119, 178488), (126, 168572), (134, 158508), (136, 156177), (148, 143514), (153, 138824), (168, 126429), (201, 105672), (204, 104118), (222, 95676), (238, 89244), (252, 84286), (259, 82008), (268, 79254), (296, 71757), (306, 69412), (333, 63784), (357, 59496), (402, 52836), (408, 52059), (444, 47838), (469, 45288), (476, 44622), (504, 42143), (518, 41004), (536, 39627), (603, 35224), (612, 34706), (629, 33768), (666, 31892), (714, 29748), (777, 27336), (804, 26418), (888, 23919), (938, 22644), (952, 22311), (1036, 20502), (1071, 19832), (1139, 18648), (1206, 17612), (1224, 17353), (1258, 16884), (1332, 15946), (1407, 15096), (1428, 14874), (1554, 13668), (1608, 13209), (1876, 11322), (1887, 11256), (2072, 10251), (2142, 9916), (2278, 9324), (2331, 9112), (2412, 8806), (2479, 8568), (2516, 8442), (2664, 7973), (2814, 7548), (2856, 7437), (3108, 6834), (3417, 6216), (3752, 5661), (3774, 5628), (4221, 5032), (4284, 4958), (4403, 4824), (4556, 4662)]