21742455

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{3907}}^1$

素因数の和:3975

約数の個数: 32

約数和(自身を含む): 40518144

約数和(自身を除く): 18775689

約数列:

[1, 3, 5, 7, 15, 21, 35, 53, 105, 159, 265, 371, 795, 1113, 1855, 3907, 5565, 11721, 19535, 27349, 58605, 82047, 136745, 207071, 410235, 621213, 1035355, 1449497, 3106065, 4348491, 7247485, 21742455]

約数ペア:

[(1, 21742455), (3, 7247485), (5, 4348491), (7, 3106065), (15, 1449497), (21, 1035355), (35, 621213), (53, 410235), (105, 207071), (159, 136745), (265, 82047), (371, 58605), (795, 27349), (1113, 19535), (1855, 11721), (3907, 5565)]