19849960

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{647}}^1$

素因数の和:730

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 29138840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 59, 65, 104, 118, 130, 236, 260, 295, 472, 520, 590, 647, 767, 1180, 1294, 1534, 2360, 2588, 3068, 3235, 3835, 5176, 6136, 6470, 7670, 8411, 12940, 15340, 16822, 25880, 30680, 33644, 38173, 42055, 67288, 76346, 84110, 152692, 168220, 190865, 305384, 336440, 381730, 496249, 763460, 992498, 1526920, 1984996, 2481245, 3969992, 4962490, 9924980, 19849960]

約数ペア:

[(1, 19849960), (2, 9924980), (4, 4962490), (5, 3969992), (8, 2481245), (10, 1984996), (13, 1526920), (20, 992498), (26, 763460), (40, 496249), (52, 381730), (59, 336440), (65, 305384), (104, 190865), (118, 168220), (130, 152692), (236, 84110), (260, 76346), (295, 67288), (472, 42055), (520, 38173), (590, 33644), (647, 30680), (767, 25880), (1180, 16822), (1294, 15340), (1534, 12940), (2360, 8411), (2588, 7670), (3068, 6470), (3235, 6136), (3835, 5176)]