640234

素因数分解:

$2^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{139}}^1$

素因数の和:202

約数の個数: 24

約数和(自身を含む): 1149120

約数和(自身を除く): 508886

約数列:

[1, 2, 7, 14, 47, 49, 94, 98, 139, 278, 329, 658, 973, 1946, 2303, 4606, 6533, 6811, 13066, 13622, 45731, 91462, 320117, 640234]

約数ペア:

[(1, 640234), (2, 320117), (7, 91462), (14, 45731), (47, 13622), (49, 13066), (94, 6811), (98, 6533), (139, 4606), (278, 2303), (329, 1946), (658, 973)]