20017725

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{419}}^1$

素因数の和:459

約数の個数: 72

約数和(自身を含む): 41559840

約数和(自身を除く): 21542115

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 49, 65, 75, 91, 105, 147, 175, 195, 245, 273, 325, 419, 455, 525, 637, 735, 975, 1225, 1257, 1365, 1911, 2095, 2275, 2933, 3185, 3675, 5447, 6285, 6825, 8799, 9555, 10475, 14665, 15925, 16341, 20531, 27235, 31425, 38129, 43995, 47775, 61593, 73325, 81705, 102655, 114387, 136175, 190645, 219975, 266903, 307965, 408525, 513275, 571935, 800709, 953225, 1334515, 1539825, 2859675, 4003545, 6672575, 20017725]

約数ペア:

[(1, 20017725), (3, 6672575), (5, 4003545), (7, 2859675), (13, 1539825), (15, 1334515), (21, 953225), (25, 800709), (35, 571935), (39, 513275), (49, 408525), (65, 307965), (75, 266903), (91, 219975), (105, 190645), (147, 136175), (175, 114387), (195, 102655), (245, 81705), (273, 73325), (325, 61593), (419, 47775), (455, 43995), (525, 38129), (637, 31425), (735, 27235), (975, 20531), (1225, 16341), (1257, 15925), (1365, 14665), (1911, 10475), (2095, 9555), (2275, 8799), (2933, 6825), (3185, 6285), (3675, 5447)]