20978748

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{83}}^1$

素因数の和:176

約数の個数: 144

約数和(自身を含む): 66044160

約数和(自身を除く): 45065412

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 17, 18, 21, 28, 34, 36, 42, 51, 59, 63, 68, 83, 84, 102, 118, 119, 126, 153, 166, 177, 204, 236, 238, 249, 252, 306, 332, 354, 357, 413, 476, 498, 531, 581, 612, 708, 714, 747, 826, 996, 1003, 1062, 1071, 1162, 1239, 1411, 1428, 1494, 1652, 1743, 2006, 2124, 2142, 2324, 2478, 2822, 2988, 3009, 3486, 3717, 4012, 4233, 4284, 4897, 4956, 5229, 5644, 6018, 6972, 7021, 7434, 8466, 9027, 9794, 9877, 10458, 12036, 12699, 14042, 14691, 14868, 16932, 18054, 19588, 19754, 20916, 21063, 25398, 28084, 29382, 29631, 34279, 36108, 39508, 42126, 44073, 50796, 58764, 59262, 63189, 68558, 83249, 84252, 88146, 88893, 102837, 118524, 126378, 137116, 166498, 176292, 177786, 205674, 249747, 252756, 308511, 332996, 355572, 411348, 499494, 582743, 617022, 749241, 998988, 1165486, 1234044, 1498482, 1748229, 2330972, 2996964, 3496458, 5244687, 6992916, 10489374, 20978748]

約数ペア:

[(1, 20978748), (2, 10489374), (3, 6992916), (4, 5244687), (6, 3496458), (7, 2996964), (9, 2330972), (12, 1748229), (14, 1498482), (17, 1234044), (18, 1165486), (21, 998988), (28, 749241), (34, 617022), (36, 582743), (42, 499494), (51, 411348), (59, 355572), (63, 332996), (68, 308511), (83, 252756), (84, 249747), (102, 205674), (118, 177786), (119, 176292), (126, 166498), (153, 137116), (166, 126378), (177, 118524), (204, 102837), (236, 88893), (238, 88146), (249, 84252), (252, 83249), (306, 68558), (332, 63189), (354, 59262), (357, 58764), (413, 50796), (476, 44073), (498, 42126), (531, 39508), (581, 36108), (612, 34279), (708, 29631), (714, 29382), (747, 28084), (826, 25398), (996, 21063), (1003, 20916), (1062, 19754), (1071, 19588), (1162, 18054), (1239, 16932), (1411, 14868), (1428, 14691), (1494, 14042), (1652, 12699), (1743, 12036), (2006, 10458), (2124, 9877), (2142, 9794), (2324, 9027), (2478, 8466), (2822, 7434), (2988, 7021), (3009, 6972), (3486, 6018), (3717, 5644), (4012, 5229), (4233, 4956), (4284, 4897)]