20647575

素因数分解:

$3^3\times 5^2\times {\mathrm{13}}^2\times {\mathrm{181}}^1$

素因数の和:226

約数の個数: 72

約数和(自身を含む): 41299440

約数和(自身を除く): 20651865

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 75, 117, 135, 169, 181, 195, 225, 325, 351, 507, 543, 585, 675, 845, 905, 975, 1521, 1629, 1755, 2353, 2535, 2715, 2925, 4225, 4525, 4563, 4887, 7059, 7605, 8145, 8775, 11765, 12675, 13575, 21177, 22815, 24435, 30589, 35295, 38025, 40725, 58825, 63531, 91767, 105885, 114075, 122175, 152945, 176475, 275301, 317655, 458835, 529425, 764725, 825903, 1376505, 1588275, 2294175, 4129515, 6882525, 20647575]

約数ペア:

[(1, 20647575), (3, 6882525), (5, 4129515), (9, 2294175), (13, 1588275), (15, 1376505), (25, 825903), (27, 764725), (39, 529425), (45, 458835), (65, 317655), (75, 275301), (117, 176475), (135, 152945), (169, 122175), (181, 114075), (195, 105885), (225, 91767), (325, 63531), (351, 58825), (507, 40725), (543, 38025), (585, 35295), (675, 30589), (845, 24435), (905, 22815), (975, 21177), (1521, 13575), (1629, 12675), (1755, 11765), (2353, 8775), (2535, 8145), (2715, 7605), (2925, 7059), (4225, 4887), (4525, 4563)]