21459040

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1889}}^1$

素因数の和:1975

約数の個数: 48

約数和(自身を含む): 51438240

約数和(自身を除く): 29979200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1889, 2272, 2840, 3778, 5680, 7556, 9445, 11360, 15112, 18890, 30224, 37780, 60448, 75560, 134119, 151120, 268238, 302240, 536476, 670595, 1072952, 1341190, 2145904, 2682380, 4291808, 5364760, 10729520, 21459040]

約数ペア:

[(1, 21459040), (2, 10729520), (4, 5364760), (5, 4291808), (8, 2682380), (10, 2145904), (16, 1341190), (20, 1072952), (32, 670595), (40, 536476), (71, 302240), (80, 268238), (142, 151120), (160, 134119), (284, 75560), (355, 60448), (568, 37780), (710, 30224), (1136, 18890), (1420, 15112), (1889, 11360), (2272, 9445), (2840, 7556), (3778, 5680)]