20747025

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{173}}^1$

素因数の和:243

約数の個数: 72

約数和(自身を含む): 41231736

約数和(自身を除く): 20484711

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 41, 45, 65, 75, 117, 123, 173, 195, 205, 225, 325, 369, 519, 533, 585, 615, 865, 975, 1025, 1557, 1599, 1845, 2249, 2595, 2665, 2925, 3075, 4325, 4797, 6747, 7093, 7785, 7995, 9225, 11245, 12975, 13325, 20241, 21279, 23985, 33735, 35465, 38925, 39975, 56225, 63837, 92209, 101205, 106395, 119925, 168675, 177325, 276627, 319185, 461045, 506025, 531975, 829881, 1383135, 1595925, 2305225, 4149405, 6915675, 20747025]

約数ペア:

[(1, 20747025), (3, 6915675), (5, 4149405), (9, 2305225), (13, 1595925), (15, 1383135), (25, 829881), (39, 531975), (41, 506025), (45, 461045), (65, 319185), (75, 276627), (117, 177325), (123, 168675), (173, 119925), (195, 106395), (205, 101205), (225, 92209), (325, 63837), (369, 56225), (519, 39975), (533, 38925), (585, 35465), (615, 33735), (865, 23985), (975, 21279), (1025, 20241), (1557, 13325), (1599, 12975), (1845, 11245), (2249, 9225), (2595, 7995), (2665, 7785), (2925, 7093), (3075, 6747), (4325, 4797)]