28639820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^2$

素因数の和:183

約数の個数: 72

約数和(自身を含む): 68901840

約数和(自身を除く): 40262020

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 29, 44, 55, 58, 67, 110, 116, 134, 145, 220, 268, 290, 319, 335, 580, 638, 670, 737, 1276, 1340, 1474, 1595, 1943, 2948, 3190, 3685, 3886, 4489, 6380, 7370, 7772, 8978, 9715, 14740, 17956, 19430, 21373, 22445, 38860, 42746, 44890, 49379, 85492, 89780, 98758, 106865, 130181, 197516, 213730, 246895, 260362, 427460, 493790, 520724, 650905, 987580, 1301810, 1431991, 2603620, 2863982, 5727964, 7159955, 14319910, 28639820]

約数ペア:

[(1, 28639820), (2, 14319910), (4, 7159955), (5, 5727964), (10, 2863982), (11, 2603620), (20, 1431991), (22, 1301810), (29, 987580), (44, 650905), (55, 520724), (58, 493790), (67, 427460), (110, 260362), (116, 246895), (134, 213730), (145, 197516), (220, 130181), (268, 106865), (290, 98758), (319, 89780), (335, 85492), (580, 49379), (638, 44890), (670, 42746), (737, 38860), (1276, 22445), (1340, 21373), (1474, 19430), (1595, 17956), (1943, 14740), (2948, 9715), (3190, 8978), (3685, 7772), (3886, 7370), (4489, 6380)]