129550180

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1\times {\mathrm{997}}^1$

素因数の和:1168

約数の個数: 48

約数和(自身を含む): 279160560

約数和(自身を除く): 149610380

約数列:

[1, 2, 4, 5, 10, 20, 73, 89, 146, 178, 292, 356, 365, 445, 730, 890, 997, 1460, 1780, 1994, 3988, 4985, 6497, 9970, 12994, 19940, 25988, 32485, 64970, 72781, 88733, 129940, 145562, 177466, 291124, 354932, 363905, 443665, 727810, 887330, 1455620, 1774660, 6477509, 12955018, 25910036, 32387545, 64775090, 129550180]

約数ペア:

[(1, 129550180), (2, 64775090), (4, 32387545), (5, 25910036), (10, 12955018), (20, 6477509), (73, 1774660), (89, 1455620), (146, 887330), (178, 727810), (292, 443665), (356, 363905), (365, 354932), (445, 291124), (730, 177466), (890, 145562), (997, 129940), (1460, 88733), (1780, 72781), (1994, 64970), (3988, 32485), (4985, 25988), (6497, 19940), (9970, 12994)]