21835205

素因数分解:

$5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1\times {\mathrm{149}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 9268795

約数列:

[1, 5, 7, 35, 53, 79, 149, 265, 371, 395, 553, 745, 1043, 1855, 2765, 4187, 5215, 7897, 11771, 20935, 29309, 39485, 55279, 58855, 82397, 146545, 276395, 411985, 623863, 3119315, 4367041, 21835205]

約数ペア:

[(1, 21835205), (5, 4367041), (7, 3119315), (35, 623863), (53, 411985), (79, 276395), (149, 146545), (265, 82397), (371, 58855), (395, 55279), (553, 39485), (745, 29309), (1043, 20935), (1855, 11771), (2765, 7897), (4187, 5215)]