21434020

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1\times {\mathrm{191}}^1$

素因数の和:412

約数の個数: 48

約数和(自身を含む): 46964736

約数和(自身を除く): 25530716

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 181, 191, 310, 362, 382, 620, 724, 764, 905, 955, 1810, 1910, 3620, 3820, 5611, 5921, 11222, 11842, 22444, 23684, 28055, 29605, 34571, 56110, 59210, 69142, 112220, 118420, 138284, 172855, 345710, 691420, 1071701, 2143402, 4286804, 5358505, 10717010, 21434020]

約数ペア:

[(1, 21434020), (2, 10717010), (4, 5358505), (5, 4286804), (10, 2143402), (20, 1071701), (31, 691420), (62, 345710), (124, 172855), (155, 138284), (181, 118420), (191, 112220), (310, 69142), (362, 59210), (382, 56110), (620, 34571), (724, 29605), (764, 28055), (905, 23684), (955, 22444), (1810, 11842), (1910, 11222), (3620, 5921), (3820, 5611)]