81108040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{2557}}^1$

素因数の和:2642

約数の個数: 64

約数和(自身を含む): 199830960

約数和(自身を除く): 118722920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 61, 65, 104, 122, 130, 244, 260, 305, 488, 520, 610, 793, 1220, 1586, 2440, 2557, 3172, 3965, 5114, 6344, 7930, 10228, 12785, 15860, 20456, 25570, 31720, 33241, 51140, 66482, 102280, 132964, 155977, 166205, 265928, 311954, 332410, 623908, 664820, 779885, 1247816, 1329640, 1559770, 2027701, 3119540, 4055402, 6239080, 8110804, 10138505, 16221608, 20277010, 40554020, 81108040]

約数ペア:

[(1, 81108040), (2, 40554020), (4, 20277010), (5, 16221608), (8, 10138505), (10, 8110804), (13, 6239080), (20, 4055402), (26, 3119540), (40, 2027701), (52, 1559770), (61, 1329640), (65, 1247816), (104, 779885), (122, 664820), (130, 623908), (244, 332410), (260, 311954), (305, 265928), (488, 166205), (520, 155977), (610, 132964), (793, 102280), (1220, 66482), (1586, 51140), (2440, 33241), (2557, 31720), (3172, 25570), (3965, 20456), (5114, 15860), (6344, 12785), (7930, 10228)]