20117685

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{271}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 37953792

約数和(自身を除く): 17836107

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 101, 105, 147, 245, 271, 303, 505, 707, 735, 813, 1355, 1515, 1897, 2121, 3535, 4065, 4949, 5691, 9485, 10605, 13279, 14847, 24745, 27371, 28455, 39837, 66395, 74235, 82113, 136855, 191597, 199185, 410565, 574791, 957985, 1341179, 2873955, 4023537, 6705895, 20117685]

約数ペア:

[(1, 20117685), (3, 6705895), (5, 4023537), (7, 2873955), (15, 1341179), (21, 957985), (35, 574791), (49, 410565), (101, 199185), (105, 191597), (147, 136855), (245, 82113), (271, 74235), (303, 66395), (505, 39837), (707, 28455), (735, 27371), (813, 24745), (1355, 14847), (1515, 13279), (1897, 10605), (2121, 9485), (3535, 5691), (4065, 4949)]