81857360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2539}}^1$

素因数の和:2596

約数の個数: 80

約数和(自身を含む): 211653120

約数和(自身を除く): 129795760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 1040, 1240, 1612, 2015, 2480, 2539, 3224, 4030, 5078, 6448, 8060, 10156, 12695, 16120, 20312, 25390, 32240, 33007, 40624, 50780, 66014, 78709, 101560, 132028, 157418, 165035, 203120, 264056, 314836, 330070, 393545, 528112, 629672, 660140, 787090, 1023217, 1259344, 1320280, 1574180, 2046434, 2640560, 3148360, 4092868, 5116085, 6296720, 8185736, 10232170, 16371472, 20464340, 40928680, 81857360]

約数ペア:

[(1, 81857360), (2, 40928680), (4, 20464340), (5, 16371472), (8, 10232170), (10, 8185736), (13, 6296720), (16, 5116085), (20, 4092868), (26, 3148360), (31, 2640560), (40, 2046434), (52, 1574180), (62, 1320280), (65, 1259344), (80, 1023217), (104, 787090), (124, 660140), (130, 629672), (155, 528112), (208, 393545), (248, 330070), (260, 314836), (310, 264056), (403, 203120), (496, 165035), (520, 157418), (620, 132028), (806, 101560), (1040, 78709), (1240, 66014), (1612, 50780), (2015, 40624), (2480, 33007), (2539, 32240), (3224, 25390), (4030, 20312), (5078, 16120), (6448, 12695), (8060, 10156)]