20857720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{40111}}^1$

素因数の和:40135

約数の個数: 32

約数和(自身を含む): 50541120

約数和(自身を除く): 29683400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 40111, 80222, 160444, 200555, 320888, 401110, 521443, 802220, 1042886, 1604440, 2085772, 2607215, 4171544, 5214430, 10428860, 20857720]

約数ペア:

[(1, 20857720), (2, 10428860), (4, 5214430), (5, 4171544), (8, 2607215), (10, 2085772), (13, 1604440), (20, 1042886), (26, 802220), (40, 521443), (52, 401110), (65, 320888), (104, 200555), (130, 160444), (260, 80222), (520, 40111)]