80124920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{317}}^1$

素因数の和:488

約数の個数: 64

約数和(自身を含む): 185457600

約数和(自身を除く): 105332680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 89, 142, 178, 284, 317, 355, 356, 445, 568, 634, 710, 712, 890, 1268, 1420, 1585, 1780, 2536, 2840, 3170, 3560, 6319, 6340, 12638, 12680, 22507, 25276, 28213, 31595, 45014, 50552, 56426, 63190, 90028, 112535, 112852, 126380, 141065, 180056, 225070, 225704, 252760, 282130, 450140, 564260, 900280, 1128520, 2003123, 4006246, 8012492, 10015615, 16024984, 20031230, 40062460, 80124920]

約数ペア:

[(1, 80124920), (2, 40062460), (4, 20031230), (5, 16024984), (8, 10015615), (10, 8012492), (20, 4006246), (40, 2003123), (71, 1128520), (89, 900280), (142, 564260), (178, 450140), (284, 282130), (317, 252760), (355, 225704), (356, 225070), (445, 180056), (568, 141065), (634, 126380), (710, 112852), (712, 112535), (890, 90028), (1268, 63190), (1420, 56426), (1585, 50552), (1780, 45014), (2536, 31595), (2840, 28213), (3170, 25276), (3560, 22507), (6319, 12680), (6340, 12638)]