21404760

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13721}}^1$

素因数の和:13748

約数の個数: 64

約数和(自身を含む): 69158880

約数和(自身を除く): 47754120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13721, 27442, 41163, 54884, 68605, 82326, 109768, 137210, 164652, 178373, 205815, 274420, 329304, 356746, 411630, 535119, 548840, 713492, 823260, 891865, 1070238, 1426984, 1646520, 1783730, 2140476, 2675595, 3567460, 4280952, 5351190, 7134920, 10702380, 21404760]

約数ペア:

[(1, 21404760), (2, 10702380), (3, 7134920), (4, 5351190), (5, 4280952), (6, 3567460), (8, 2675595), (10, 2140476), (12, 1783730), (13, 1646520), (15, 1426984), (20, 1070238), (24, 891865), (26, 823260), (30, 713492), (39, 548840), (40, 535119), (52, 411630), (60, 356746), (65, 329304), (78, 274420), (104, 205815), (120, 178373), (130, 164652), (156, 137210), (195, 109768), (260, 82326), (312, 68605), (390, 54884), (520, 41163), (780, 27442), (1560, 13721)]