18947120

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{1453}}^1$

素因数の和:1629

約数の個数: 40

約数和(自身を含む): 44352816

約数和(自身を除く): 25405696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1453, 1630, 2608, 2906, 3260, 5812, 6520, 7265, 11624, 13040, 14530, 23248, 29060, 58120, 116240, 236839, 473678, 947356, 1184195, 1894712, 2368390, 3789424, 4736780, 9473560, 18947120]

約数ペア:

[(1, 18947120), (2, 9473560), (4, 4736780), (5, 3789424), (8, 2368390), (10, 1894712), (16, 1184195), (20, 947356), (40, 473678), (80, 236839), (163, 116240), (326, 58120), (652, 29060), (815, 23248), (1304, 14530), (1453, 13040), (1630, 11624), (2608, 7265), (2906, 6520), (3260, 5812)]