20215678480

素因数分解:

$2^4\times 5^1\times {\mathrm{653}}^1\times {\mathrm{386977}}^1$

素因数の和:387643

約数の個数: 40

約数和(自身を含む): 47073551832

約数和(自身を除く): 26857873352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 653, 1306, 2612, 3265, 5224, 6530, 10448, 13060, 26120, 52240, 386977, 773954, 1547908, 1934885, 3095816, 3869770, 6191632, 7739540, 15479080, 30958160, 252695981, 505391962, 1010783924, 1263479905, 2021567848, 2526959810, 4043135696, 5053919620, 10107839240, 20215678480]

約数ペア:

[(1, 20215678480), (2, 10107839240), (4, 5053919620), (5, 4043135696), (8, 2526959810), (10, 2021567848), (16, 1263479905), (20, 1010783924), (40, 505391962), (80, 252695981), (653, 30958160), (1306, 15479080), (2612, 7739540), (3265, 6191632), (5224, 3869770), (6530, 3095816), (10448, 1934885), (13060, 1547908), (26120, 773954), (52240, 386977)]