20653820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{269}}^1\times {\mathrm{349}}^1$

素因数の和:638

約数の個数: 48

約数和(自身を含む): 47628000

約数和(自身を除く): 26974180

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 269, 349, 538, 698, 1076, 1345, 1396, 1745, 2690, 2959, 3490, 3839, 5380, 5918, 6980, 7678, 11836, 14795, 15356, 19195, 29590, 38390, 59180, 76780, 93881, 187762, 375524, 469405, 938810, 1032691, 1877620, 2065382, 4130764, 5163455, 10326910, 20653820]

約数ペア:

[(1, 20653820), (2, 10326910), (4, 5163455), (5, 4130764), (10, 2065382), (11, 1877620), (20, 1032691), (22, 938810), (44, 469405), (55, 375524), (110, 187762), (220, 93881), (269, 76780), (349, 59180), (538, 38390), (698, 29590), (1076, 19195), (1345, 15356), (1396, 14795), (1745, 11836), (2690, 7678), (2959, 6980), (3490, 5918), (3839, 5380)]