81848680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{443}}^1$

素因数の和:634

約数の個数: 64

約数和(自身を含む): 191808000

約数和(自身を除く): 109959320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 149, 155, 248, 298, 310, 443, 596, 620, 745, 886, 1192, 1240, 1490, 1772, 2215, 2980, 3544, 4430, 4619, 5960, 8860, 9238, 13733, 17720, 18476, 23095, 27466, 36952, 46190, 54932, 66007, 68665, 92380, 109864, 132014, 137330, 184760, 264028, 274660, 330035, 528056, 549320, 660070, 1320140, 2046217, 2640280, 4092434, 8184868, 10231085, 16369736, 20462170, 40924340, 81848680]

約数ペア:

[(1, 81848680), (2, 40924340), (4, 20462170), (5, 16369736), (8, 10231085), (10, 8184868), (20, 4092434), (31, 2640280), (40, 2046217), (62, 1320140), (124, 660070), (149, 549320), (155, 528056), (248, 330035), (298, 274660), (310, 264028), (443, 184760), (596, 137330), (620, 132014), (745, 109864), (886, 92380), (1192, 68665), (1240, 66007), (1490, 54932), (1772, 46190), (2215, 36952), (2980, 27466), (3544, 23095), (4430, 18476), (4619, 17720), (5960, 13733), (8860, 9238)]