81821090

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1$

素因数の和:387

約数の個数: 64

約数和(自身を含む): 166440960

約数和(自身を除く): 84619870

約数列:

[1, 2, 5, 10, 13, 26, 31, 62, 65, 79, 130, 155, 158, 257, 310, 395, 403, 514, 790, 806, 1027, 1285, 2015, 2054, 2449, 2570, 3341, 4030, 4898, 5135, 6682, 7967, 10270, 12245, 15934, 16705, 20303, 24490, 31837, 33410, 39835, 40606, 63674, 79670, 101515, 103571, 159185, 203030, 207142, 263939, 318370, 517855, 527878, 629393, 1035710, 1258786, 1319695, 2639390, 3146965, 6293930, 8182109, 16364218, 40910545, 81821090]

約数ペア:

[(1, 81821090), (2, 40910545), (5, 16364218), (10, 8182109), (13, 6293930), (26, 3146965), (31, 2639390), (62, 1319695), (65, 1258786), (79, 1035710), (130, 629393), (155, 527878), (158, 517855), (257, 318370), (310, 263939), (395, 207142), (403, 203030), (514, 159185), (790, 103571), (806, 101515), (1027, 79670), (1285, 63674), (2015, 40606), (2054, 39835), (2449, 33410), (2570, 31837), (3341, 24490), (4030, 20303), (4898, 16705), (5135, 15934), (6682, 12245), (7967, 10270)]