81869940

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{521}}^1$

素因数の和:639

約数の個数: 120

約数和(自身を含む): 259974792

約数和(自身を除く): 178104852

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 97, 108, 135, 162, 180, 194, 270, 291, 324, 388, 405, 485, 521, 540, 582, 810, 873, 970, 1042, 1164, 1455, 1563, 1620, 1746, 1940, 2084, 2605, 2619, 2910, 3126, 3492, 4365, 4689, 5210, 5238, 5820, 6252, 7815, 7857, 8730, 9378, 10420, 10476, 13095, 14067, 15630, 15714, 17460, 18756, 23445, 26190, 28134, 31260, 31428, 39285, 42201, 46890, 50537, 52380, 56268, 70335, 78570, 84402, 93780, 101074, 140670, 151611, 157140, 168804, 202148, 211005, 252685, 281340, 303222, 422010, 454833, 505370, 606444, 758055, 844020, 909666, 1010740, 1364499, 1516110, 1819332, 2274165, 2728998, 3032220, 4093497, 4548330, 5457996, 6822495, 8186994, 9096660, 13644990, 16373988, 20467485, 27289980, 40934970, 81869940]

約数ペア:

[(1, 81869940), (2, 40934970), (3, 27289980), (4, 20467485), (5, 16373988), (6, 13644990), (9, 9096660), (10, 8186994), (12, 6822495), (15, 5457996), (18, 4548330), (20, 4093497), (27, 3032220), (30, 2728998), (36, 2274165), (45, 1819332), (54, 1516110), (60, 1364499), (81, 1010740), (90, 909666), (97, 844020), (108, 758055), (135, 606444), (162, 505370), (180, 454833), (194, 422010), (270, 303222), (291, 281340), (324, 252685), (388, 211005), (405, 202148), (485, 168804), (521, 157140), (540, 151611), (582, 140670), (810, 101074), (873, 93780), (970, 84402), (1042, 78570), (1164, 70335), (1455, 56268), (1563, 52380), (1620, 50537), (1746, 46890), (1940, 42201), (2084, 39285), (2605, 31428), (2619, 31260), (2910, 28134), (3126, 26190), (3492, 23445), (4365, 18756), (4689, 17460), (5210, 15714), (5238, 15630), (5820, 14067), (6252, 13095), (7815, 10476), (7857, 10420), (8730, 9378)]