20215875

素因数分解:

$3^1\times 5^3\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:133

約数の個数: 64

約数和(自身を含む): 36421632

約数和(自身を除く): 16205757

約数列:

[1, 3, 5, 15, 25, 31, 37, 47, 75, 93, 111, 125, 141, 155, 185, 235, 375, 465, 555, 705, 775, 925, 1147, 1175, 1457, 1739, 2325, 2775, 3441, 3525, 3875, 4371, 4625, 5217, 5735, 5875, 7285, 8695, 11625, 13875, 17205, 17625, 21855, 26085, 28675, 36425, 43475, 53909, 86025, 109275, 130425, 143375, 161727, 182125, 217375, 269545, 430125, 546375, 652125, 808635, 1347725, 4043175, 6738625, 20215875]

約数ペア:

[(1, 20215875), (3, 6738625), (5, 4043175), (15, 1347725), (25, 808635), (31, 652125), (37, 546375), (47, 430125), (75, 269545), (93, 217375), (111, 182125), (125, 161727), (141, 143375), (155, 130425), (185, 109275), (235, 86025), (375, 53909), (465, 43475), (555, 36425), (705, 28675), (775, 26085), (925, 21855), (1147, 17625), (1175, 17205), (1457, 13875), (1739, 11625), (2325, 8695), (2775, 7285), (3441, 5875), (3525, 5735), (3875, 5217), (4371, 4625)]