81391120

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{887}}^1$

素因数の和:968

約数の個数: 80

約数和(自身を含む): 200844288

約数和(自身を除く): 119453168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 37, 40, 62, 74, 80, 124, 148, 155, 185, 248, 296, 310, 370, 496, 592, 620, 740, 887, 1147, 1240, 1480, 1774, 2294, 2480, 2960, 3548, 4435, 4588, 5735, 7096, 8870, 9176, 11470, 14192, 17740, 18352, 22940, 27497, 32819, 35480, 45880, 54994, 65638, 70960, 91760, 109988, 131276, 137485, 164095, 219976, 262552, 274970, 328190, 439952, 525104, 549940, 656380, 1017389, 1099880, 1312760, 2034778, 2199760, 2625520, 4069556, 5086945, 8139112, 10173890, 16278224, 20347780, 40695560, 81391120]

約数ペア:

[(1, 81391120), (2, 40695560), (4, 20347780), (5, 16278224), (8, 10173890), (10, 8139112), (16, 5086945), (20, 4069556), (31, 2625520), (37, 2199760), (40, 2034778), (62, 1312760), (74, 1099880), (80, 1017389), (124, 656380), (148, 549940), (155, 525104), (185, 439952), (248, 328190), (296, 274970), (310, 262552), (370, 219976), (496, 164095), (592, 137485), (620, 131276), (740, 109988), (887, 91760), (1147, 70960), (1240, 65638), (1480, 54994), (1774, 45880), (2294, 35480), (2480, 32819), (2960, 27497), (3548, 22940), (4435, 18352), (4588, 17740), (5735, 14192), (7096, 11470), (8870, 9176)]