20983440

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:209

約数の個数: 160

約数和(自身を含む): 71245440

約数和(自身を除く): 50262000

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 34, 37, 40, 48, 51, 60, 68, 74, 80, 85, 102, 111, 120, 136, 139, 148, 170, 185, 204, 222, 240, 255, 272, 278, 296, 340, 370, 408, 417, 444, 510, 555, 556, 592, 629, 680, 695, 740, 816, 834, 888, 1020, 1110, 1112, 1258, 1360, 1390, 1480, 1668, 1776, 1887, 2040, 2085, 2220, 2224, 2363, 2516, 2780, 2960, 3145, 3336, 3774, 4080, 4170, 4440, 4726, 5032, 5143, 5560, 6290, 6672, 7089, 7548, 8340, 8880, 9435, 9452, 10064, 10286, 11120, 11815, 12580, 14178, 15096, 15429, 16680, 18870, 18904, 20572, 23630, 25160, 25715, 28356, 30192, 30858, 33360, 35445, 37740, 37808, 41144, 47260, 50320, 51430, 56712, 61716, 70890, 75480, 77145, 82288, 87431, 94520, 102860, 113424, 123432, 141780, 150960, 154290, 174862, 189040, 205720, 246864, 262293, 283560, 308580, 349724, 411440, 437155, 524586, 567120, 617160, 699448, 874310, 1049172, 1234320, 1311465, 1398896, 1748620, 2098344, 2622930, 3497240, 4196688, 5245860, 6994480, 10491720, 20983440]

約数ペア:

[(1, 20983440), (2, 10491720), (3, 6994480), (4, 5245860), (5, 4196688), (6, 3497240), (8, 2622930), (10, 2098344), (12, 1748620), (15, 1398896), (16, 1311465), (17, 1234320), (20, 1049172), (24, 874310), (30, 699448), (34, 617160), (37, 567120), (40, 524586), (48, 437155), (51, 411440), (60, 349724), (68, 308580), (74, 283560), (80, 262293), (85, 246864), (102, 205720), (111, 189040), (120, 174862), (136, 154290), (139, 150960), (148, 141780), (170, 123432), (185, 113424), (204, 102860), (222, 94520), (240, 87431), (255, 82288), (272, 77145), (278, 75480), (296, 70890), (340, 61716), (370, 56712), (408, 51430), (417, 50320), (444, 47260), (510, 41144), (555, 37808), (556, 37740), (592, 35445), (629, 33360), (680, 30858), (695, 30192), (740, 28356), (816, 25715), (834, 25160), (888, 23630), (1020, 20572), (1110, 18904), (1112, 18870), (1258, 16680), (1360, 15429), (1390, 15096), (1480, 14178), (1668, 12580), (1776, 11815), (1887, 11120), (2040, 10286), (2085, 10064), (2220, 9452), (2224, 9435), (2363, 8880), (2516, 8340), (2780, 7548), (2960, 7089), (3145, 6672), (3336, 6290), (3774, 5560), (4080, 5143), (4170, 5032), (4440, 4726)]