81969680

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{269}}^1\times {\mathrm{293}}^1$

素因数の和:588

約数の個数: 80

約数和(自身を含む): 206705520

約数和(自身を除く): 124735840

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 269, 293, 520, 538, 586, 1040, 1076, 1172, 1345, 1465, 2152, 2344, 2690, 2930, 3497, 3809, 4304, 4688, 5380, 5860, 6994, 7618, 10760, 11720, 13988, 15236, 17485, 19045, 21520, 23440, 27976, 30472, 34970, 38090, 55952, 60944, 69940, 76180, 78817, 139880, 152360, 157634, 279760, 304720, 315268, 394085, 630536, 788170, 1024621, 1261072, 1576340, 2049242, 3152680, 4098484, 5123105, 6305360, 8196968, 10246210, 16393936, 20492420, 40984840, 81969680]

約数ペア:

[(1, 81969680), (2, 40984840), (4, 20492420), (5, 16393936), (8, 10246210), (10, 8196968), (13, 6305360), (16, 5123105), (20, 4098484), (26, 3152680), (40, 2049242), (52, 1576340), (65, 1261072), (80, 1024621), (104, 788170), (130, 630536), (208, 394085), (260, 315268), (269, 304720), (293, 279760), (520, 157634), (538, 152360), (586, 139880), (1040, 78817), (1076, 76180), (1172, 69940), (1345, 60944), (1465, 55952), (2152, 38090), (2344, 34970), (2690, 30472), (2930, 27976), (3497, 23440), (3809, 21520), (4304, 19045), (4688, 17485), (5380, 15236), (5860, 13988), (6994, 11720), (7618, 10760)]