90393820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{641}}^2$

素因数の和:1302

約数の個数: 36

約数和(自身を含む): 207407592

約数和(自身を除く): 117013772

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 641, 1282, 2564, 3205, 6410, 7051, 12820, 14102, 28204, 35255, 70510, 141020, 410881, 821762, 1643524, 2054405, 4108810, 4519691, 8217620, 9039382, 18078764, 22598455, 45196910, 90393820]

約数ペア:

[(1, 90393820), (2, 45196910), (4, 22598455), (5, 18078764), (10, 9039382), (11, 8217620), (20, 4519691), (22, 4108810), (44, 2054405), (55, 1643524), (110, 821762), (220, 410881), (641, 141020), (1282, 70510), (2564, 35255), (3205, 28204), (6410, 14102), (7051, 12820)]