20353840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19571}}^1$

素因数の和:19597

約数の個数: 40

約数和(自身を含む): 50965488

約数和(自身を除く): 30611648

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19571, 39142, 78284, 97855, 156568, 195710, 254423, 313136, 391420, 508846, 782840, 1017692, 1272115, 1565680, 2035384, 2544230, 4070768, 5088460, 10176920, 20353840]

約数ペア:

[(1, 20353840), (2, 10176920), (4, 5088460), (5, 4070768), (8, 2544230), (10, 2035384), (13, 1565680), (16, 1272115), (20, 1017692), (26, 782840), (40, 508846), (52, 391420), (65, 313136), (80, 254423), (104, 195710), (130, 156568), (208, 97855), (260, 78284), (520, 39142), (1040, 19571)]