20849800

素因数分解:

$2^3\times 5^2\times {\mathrm{61}}^1\times {\mathrm{1709}}^1$

素因数の和:1786

約数の個数: 48

約数和(自身を含む): 49299300

約数和(自身を除く): 28449500

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 61, 100, 122, 200, 244, 305, 488, 610, 1220, 1525, 1709, 2440, 3050, 3418, 6100, 6836, 8545, 12200, 13672, 17090, 34180, 42725, 68360, 85450, 104249, 170900, 208498, 341800, 416996, 521245, 833992, 1042490, 2084980, 2606225, 4169960, 5212450, 10424900, 20849800]

約数ペア:

[(1, 20849800), (2, 10424900), (4, 5212450), (5, 4169960), (8, 2606225), (10, 2084980), (20, 1042490), (25, 833992), (40, 521245), (50, 416996), (61, 341800), (100, 208498), (122, 170900), (200, 104249), (244, 85450), (305, 68360), (488, 42725), (610, 34180), (1220, 17090), (1525, 13672), (1709, 12200), (2440, 8545), (3050, 6836), (3418, 6100)]