20758725

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{151}}^1$

素因数の和:227

約数の個数: 72

約数和(自身を含む): 41164032

約数和(自身を除く): 20405307

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 47, 65, 75, 117, 141, 151, 195, 225, 235, 325, 423, 453, 585, 611, 705, 755, 975, 1175, 1359, 1833, 1963, 2115, 2265, 2925, 3055, 3525, 3775, 5499, 5889, 6795, 7097, 9165, 9815, 10575, 11325, 15275, 17667, 21291, 27495, 29445, 33975, 35485, 45825, 49075, 63873, 88335, 92261, 106455, 137475, 147225, 177425, 276783, 319365, 441675, 461305, 532275, 830349, 1383915, 1596825, 2306525, 4151745, 6919575, 20758725]

約数ペア:

[(1, 20758725), (3, 6919575), (5, 4151745), (9, 2306525), (13, 1596825), (15, 1383915), (25, 830349), (39, 532275), (45, 461305), (47, 441675), (65, 319365), (75, 276783), (117, 177425), (141, 147225), (151, 137475), (195, 106455), (225, 92261), (235, 88335), (325, 63873), (423, 49075), (453, 45825), (585, 35485), (611, 33975), (705, 29445), (755, 27495), (975, 21291), (1175, 17667), (1359, 15275), (1833, 11325), (1963, 10575), (2115, 9815), (2265, 9165), (2925, 7097), (3055, 6795), (3525, 5889), (3775, 5499)]