20812720

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8971}}^1$

素因数の和:9013

約数の個数: 40

約数和(自身を含む): 50063760

約数和(自身を除く): 29251040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 8971, 17942, 35884, 44855, 71768, 89710, 143536, 179420, 260159, 358840, 520318, 717680, 1040636, 1300795, 2081272, 2601590, 4162544, 5203180, 10406360, 20812720]

約数ペア:

[(1, 20812720), (2, 10406360), (4, 5203180), (5, 4162544), (8, 2601590), (10, 2081272), (16, 1300795), (20, 1040636), (29, 717680), (40, 520318), (58, 358840), (80, 260159), (116, 179420), (145, 143536), (232, 89710), (290, 71768), (464, 44855), (580, 35884), (1160, 17942), (2320, 8971)]