81371340

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1759}}^1$

素因数の和:2031

約数の個数: 72

約数和(自身を含む): 247927680

約数和(自身を除く): 166556340

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 257, 514, 771, 1028, 1285, 1542, 1759, 2313, 2570, 3084, 3518, 3855, 4626, 5140, 5277, 7036, 7710, 8795, 9252, 10554, 11565, 15420, 15831, 17590, 21108, 23130, 26385, 31662, 35180, 46260, 52770, 63324, 79155, 105540, 158310, 316620, 452063, 904126, 1356189, 1808252, 2260315, 2712378, 4068567, 4520630, 5424756, 6780945, 8137134, 9041260, 13561890, 16274268, 20342835, 27123780, 40685670, 81371340]

約数ペア:

[(1, 81371340), (2, 40685670), (3, 27123780), (4, 20342835), (5, 16274268), (6, 13561890), (9, 9041260), (10, 8137134), (12, 6780945), (15, 5424756), (18, 4520630), (20, 4068567), (30, 2712378), (36, 2260315), (45, 1808252), (60, 1356189), (90, 904126), (180, 452063), (257, 316620), (514, 158310), (771, 105540), (1028, 79155), (1285, 63324), (1542, 52770), (1759, 46260), (2313, 35180), (2570, 31662), (3084, 26385), (3518, 23130), (3855, 21108), (4626, 17590), (5140, 15831), (5277, 15420), (7036, 11565), (7710, 10554), (8795, 9252)]