21412280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{211}}^1$

素因数の和:324

約数の個数: 64

約数和(自身を含む): 50371200

約数和(自身を除く): 28958920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 59, 86, 118, 172, 211, 215, 236, 295, 344, 422, 430, 472, 590, 844, 860, 1055, 1180, 1688, 1720, 2110, 2360, 2537, 4220, 5074, 8440, 9073, 10148, 12449, 12685, 18146, 20296, 24898, 25370, 36292, 45365, 49796, 50740, 62245, 72584, 90730, 99592, 101480, 124490, 181460, 248980, 362920, 497960, 535307, 1070614, 2141228, 2676535, 4282456, 5353070, 10706140, 21412280]

約数ペア:

[(1, 21412280), (2, 10706140), (4, 5353070), (5, 4282456), (8, 2676535), (10, 2141228), (20, 1070614), (40, 535307), (43, 497960), (59, 362920), (86, 248980), (118, 181460), (172, 124490), (211, 101480), (215, 99592), (236, 90730), (295, 72584), (344, 62245), (422, 50740), (430, 49796), (472, 45365), (590, 36292), (844, 25370), (860, 24898), (1055, 20296), (1180, 18146), (1688, 12685), (1720, 12449), (2110, 10148), (2360, 9073), (2537, 8440), (4220, 5074)]