19859920

素因数分解:

$2^4\times 5^1\times {\mathrm{163}}^1\times {\mathrm{1523}}^1$

素因数の和:1699

約数の個数: 40

約数和(自身を含む): 46488096

約数和(自身を除く): 26628176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 163, 326, 652, 815, 1304, 1523, 1630, 2608, 3046, 3260, 6092, 6520, 7615, 12184, 13040, 15230, 24368, 30460, 60920, 121840, 248249, 496498, 992996, 1241245, 1985992, 2482490, 3971984, 4964980, 9929960, 19859920]

約数ペア:

[(1, 19859920), (2, 9929960), (4, 4964980), (5, 3971984), (8, 2482490), (10, 1985992), (16, 1241245), (20, 992996), (40, 496498), (80, 248249), (163, 121840), (326, 60920), (652, 30460), (815, 24368), (1304, 15230), (1523, 13040), (1630, 12184), (2608, 7615), (3046, 6520), (3260, 6092)]