20984760

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{821}}^1$

素因数の和:909

約数の個数: 96

約数和(自身を含む): 69245280

約数和(自身を除く): 48260520

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 71, 72, 90, 120, 142, 180, 213, 284, 355, 360, 426, 568, 639, 710, 821, 852, 1065, 1278, 1420, 1642, 1704, 2130, 2463, 2556, 2840, 3195, 3284, 4105, 4260, 4926, 5112, 6390, 6568, 7389, 8210, 8520, 9852, 12315, 12780, 14778, 16420, 19704, 24630, 25560, 29556, 32840, 36945, 49260, 58291, 59112, 73890, 98520, 116582, 147780, 174873, 233164, 291455, 295560, 349746, 466328, 524619, 582910, 699492, 874365, 1049238, 1165820, 1398984, 1748730, 2098476, 2331640, 2623095, 3497460, 4196952, 5246190, 6994920, 10492380, 20984760]

約数ペア:

[(1, 20984760), (2, 10492380), (3, 6994920), (4, 5246190), (5, 4196952), (6, 3497460), (8, 2623095), (9, 2331640), (10, 2098476), (12, 1748730), (15, 1398984), (18, 1165820), (20, 1049238), (24, 874365), (30, 699492), (36, 582910), (40, 524619), (45, 466328), (60, 349746), (71, 295560), (72, 291455), (90, 233164), (120, 174873), (142, 147780), (180, 116582), (213, 98520), (284, 73890), (355, 59112), (360, 58291), (426, 49260), (568, 36945), (639, 32840), (710, 29556), (821, 25560), (852, 24630), (1065, 19704), (1278, 16420), (1420, 14778), (1642, 12780), (1704, 12315), (2130, 9852), (2463, 8520), (2556, 8210), (2840, 7389), (3195, 6568), (3284, 6390), (4105, 5112), (4260, 4926)]