639018

素因数分解:

$2^1\times 3^2\times {\mathrm{131}}^1\times {\mathrm{271}}^1$

素因数の和:410

約数の個数: 24

約数和(自身を含む): 1400256

約数和(自身を除く): 761238

約数列:

[1, 2, 3, 6, 9, 18, 131, 262, 271, 393, 542, 786, 813, 1179, 1626, 2358, 2439, 4878, 35501, 71002, 106503, 213006, 319509, 639018]

約数ペア:

[(1, 639018), (2, 319509), (3, 213006), (6, 106503), (9, 71002), (18, 35501), (131, 4878), (262, 2439), (271, 2358), (393, 1626), (542, 1179), (786, 813)]