81087500

素因数分解:

$2^2\times 5^5\times {\mathrm{13}}^1\times {\mathrm{499}}^1$

素因数の和:541

約数の個数: 72

約数和(自身を含む): 191394000

約数和(自身を除く): 110306500

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 499, 500, 625, 650, 998, 1250, 1300, 1625, 1996, 2495, 2500, 3125, 3250, 4990, 6250, 6487, 6500, 8125, 9980, 12475, 12500, 12974, 16250, 24950, 25948, 32435, 32500, 40625, 49900, 62375, 64870, 81250, 124750, 129740, 162175, 162500, 249500, 311875, 324350, 623750, 648700, 810875, 1247500, 1559375, 1621750, 3118750, 3243500, 4054375, 6237500, 8108750, 16217500, 20271875, 40543750, 81087500]

約数ペア:

[(1, 81087500), (2, 40543750), (4, 20271875), (5, 16217500), (10, 8108750), (13, 6237500), (20, 4054375), (25, 3243500), (26, 3118750), (50, 1621750), (52, 1559375), (65, 1247500), (100, 810875), (125, 648700), (130, 623750), (250, 324350), (260, 311875), (325, 249500), (499, 162500), (500, 162175), (625, 129740), (650, 124750), (998, 81250), (1250, 64870), (1300, 62375), (1625, 49900), (1996, 40625), (2495, 32500), (2500, 32435), (3125, 25948), (3250, 24950), (4990, 16250), (6250, 12974), (6487, 12500), (6500, 12475), (8125, 9980)]