20798830

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:461

約数の個数: 48

約数和(自身を含む): 41952384

約数和(自身を除く): 21153554

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 130, 155, 169, 310, 338, 397, 403, 794, 806, 845, 1690, 1985, 2015, 3970, 4030, 5161, 5239, 10322, 10478, 12307, 24614, 25805, 26195, 51610, 52390, 61535, 67093, 123070, 134186, 159991, 319982, 335465, 670930, 799955, 1599910, 2079883, 4159766, 10399415, 20798830]

約数ペア:

[(1, 20798830), (2, 10399415), (5, 4159766), (10, 2079883), (13, 1599910), (26, 799955), (31, 670930), (62, 335465), (65, 319982), (130, 159991), (155, 134186), (169, 123070), (310, 67093), (338, 61535), (397, 52390), (403, 51610), (794, 26195), (806, 25805), (845, 24614), (1690, 12307), (1985, 10478), (2015, 10322), (3970, 5239), (4030, 5161)]