20081425

素因数分解:

$5^2\times 7^2\times {\mathrm{13}}^2\times {\mathrm{97}}^1$

素因数の和:147

約数の個数: 54

約数和(自身を含む): 31689378

約数和(自身を除く): 11607953

約数列:

[1, 5, 7, 13, 25, 35, 49, 65, 91, 97, 169, 175, 245, 325, 455, 485, 637, 679, 845, 1183, 1225, 1261, 2275, 2425, 3185, 3395, 4225, 4753, 5915, 6305, 8281, 8827, 15925, 16393, 16975, 23765, 29575, 31525, 41405, 44135, 61789, 81965, 114751, 118825, 207025, 220675, 308945, 409825, 573755, 803257, 1544725, 2868775, 4016285, 20081425]

約数ペア:

[(1, 20081425), (5, 4016285), (7, 2868775), (13, 1544725), (25, 803257), (35, 573755), (49, 409825), (65, 308945), (91, 220675), (97, 207025), (169, 118825), (175, 114751), (245, 81965), (325, 61789), (455, 44135), (485, 41405), (637, 31525), (679, 29575), (845, 23765), (1183, 16975), (1225, 16393), (1261, 15925), (2275, 8827), (2425, 8281), (3185, 6305), (3395, 5915), (4225, 4753)]