20599940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{163}}^1$

素因数の和:332

約数の個数: 48

約数和(自身を含む): 44634240

約数和(自身を除く): 24034300

約数列:

[1, 2, 4, 5, 10, 20, 71, 89, 142, 163, 178, 284, 326, 355, 356, 445, 652, 710, 815, 890, 1420, 1630, 1780, 3260, 6319, 11573, 12638, 14507, 23146, 25276, 29014, 31595, 46292, 57865, 58028, 63190, 72535, 115730, 126380, 145070, 231460, 290140, 1029997, 2059994, 4119988, 5149985, 10299970, 20599940]

約数ペア:

[(1, 20599940), (2, 10299970), (4, 5149985), (5, 4119988), (10, 2059994), (20, 1029997), (71, 290140), (89, 231460), (142, 145070), (163, 126380), (178, 115730), (284, 72535), (326, 63190), (355, 58028), (356, 57865), (445, 46292), (652, 31595), (710, 29014), (815, 25276), (890, 23146), (1420, 14507), (1630, 12638), (1780, 11573), (3260, 6319)]