256379440

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{19661}}^1$

素因数の和:19837

約数の個数: 40

約数和(自身を含む): 599769648

約数和(自身を除く): 343390208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1630, 2608, 3260, 6520, 13040, 19661, 39322, 78644, 98305, 157288, 196610, 314576, 393220, 786440, 1572880, 3204743, 6409486, 12818972, 16023715, 25637944, 32047430, 51275888, 64094860, 128189720, 256379440]

約数ペア:

[(1, 256379440), (2, 128189720), (4, 64094860), (5, 51275888), (8, 32047430), (10, 25637944), (16, 16023715), (20, 12818972), (40, 6409486), (80, 3204743), (163, 1572880), (326, 786440), (652, 393220), (815, 314576), (1304, 196610), (1630, 157288), (2608, 98305), (3260, 78644), (6520, 39322), (13040, 19661)]