21851820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{1663}}^1$

素因数の和:1751

約数の個数: 72

約数和(自身を含む): 67232256

約数和(自身を除く): 45380436

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 73, 90, 146, 180, 219, 292, 365, 438, 657, 730, 876, 1095, 1314, 1460, 1663, 2190, 2628, 3285, 3326, 4380, 4989, 6570, 6652, 8315, 9978, 13140, 14967, 16630, 19956, 24945, 29934, 33260, 49890, 59868, 74835, 99780, 121399, 149670, 242798, 299340, 364197, 485596, 606995, 728394, 1092591, 1213990, 1456788, 1820985, 2185182, 2427980, 3641970, 4370364, 5462955, 7283940, 10925910, 21851820]

約数ペア:

[(1, 21851820), (2, 10925910), (3, 7283940), (4, 5462955), (5, 4370364), (6, 3641970), (9, 2427980), (10, 2185182), (12, 1820985), (15, 1456788), (18, 1213990), (20, 1092591), (30, 728394), (36, 606995), (45, 485596), (60, 364197), (73, 299340), (90, 242798), (146, 149670), (180, 121399), (219, 99780), (292, 74835), (365, 59868), (438, 49890), (657, 33260), (730, 29934), (876, 24945), (1095, 19956), (1314, 16630), (1460, 14967), (1663, 13140), (2190, 9978), (2628, 8315), (3285, 6652), (3326, 6570), (4380, 4989)]