20906680

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{269}}^1$

素因数の和:376

約数の個数: 64

約数和(自身を含む): 49572000

約数和(自身を除く): 28665320

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 67, 116, 134, 145, 232, 268, 269, 290, 335, 536, 538, 580, 670, 1076, 1160, 1340, 1345, 1943, 2152, 2680, 2690, 3886, 5380, 7772, 7801, 9715, 10760, 15544, 15602, 18023, 19430, 31204, 36046, 38860, 39005, 62408, 72092, 77720, 78010, 90115, 144184, 156020, 180230, 312040, 360460, 522667, 720920, 1045334, 2090668, 2613335, 4181336, 5226670, 10453340, 20906680]

約数ペア:

[(1, 20906680), (2, 10453340), (4, 5226670), (5, 4181336), (8, 2613335), (10, 2090668), (20, 1045334), (29, 720920), (40, 522667), (58, 360460), (67, 312040), (116, 180230), (134, 156020), (145, 144184), (232, 90115), (268, 78010), (269, 77720), (290, 72092), (335, 62408), (536, 39005), (538, 38860), (580, 36046), (670, 31204), (1076, 19430), (1160, 18023), (1340, 15602), (1345, 15544), (1943, 10760), (2152, 9715), (2680, 7801), (2690, 7772), (3886, 5380)]