81907040

素因数分解:

$2^5\times 5^1\times {\mathrm{271}}^1\times {\mathrm{1889}}^1$

素因数の和:2175

約数の個数: 48

約数和(自身を含む): 194322240

約数和(自身を除く): 112415200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 271, 542, 1084, 1355, 1889, 2168, 2710, 3778, 4336, 5420, 7556, 8672, 9445, 10840, 15112, 18890, 21680, 30224, 37780, 43360, 60448, 75560, 151120, 302240, 511919, 1023838, 2047676, 2559595, 4095352, 5119190, 8190704, 10238380, 16381408, 20476760, 40953520, 81907040]

約数ペア:

[(1, 81907040), (2, 40953520), (4, 20476760), (5, 16381408), (8, 10238380), (10, 8190704), (16, 5119190), (20, 4095352), (32, 2559595), (40, 2047676), (80, 1023838), (160, 511919), (271, 302240), (542, 151120), (1084, 75560), (1355, 60448), (1889, 43360), (2168, 37780), (2710, 30224), (3778, 21680), (4336, 18890), (5420, 15112), (7556, 10840), (8672, 9445)]