20181240

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{919}}^1$

素因数の和:997

約数の個数: 96

約数和(自身を含む): 66736800

約数和(自身を除く): 46555560

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 61, 72, 90, 120, 122, 180, 183, 244, 305, 360, 366, 488, 549, 610, 732, 915, 919, 1098, 1220, 1464, 1830, 1838, 2196, 2440, 2745, 2757, 3660, 3676, 4392, 4595, 5490, 5514, 7320, 7352, 8271, 9190, 10980, 11028, 13785, 16542, 18380, 21960, 22056, 27570, 33084, 36760, 41355, 55140, 56059, 66168, 82710, 110280, 112118, 165420, 168177, 224236, 280295, 330840, 336354, 448472, 504531, 560590, 672708, 840885, 1009062, 1121180, 1345416, 1681770, 2018124, 2242360, 2522655, 3363540, 4036248, 5045310, 6727080, 10090620, 20181240]

約数ペア:

[(1, 20181240), (2, 10090620), (3, 6727080), (4, 5045310), (5, 4036248), (6, 3363540), (8, 2522655), (9, 2242360), (10, 2018124), (12, 1681770), (15, 1345416), (18, 1121180), (20, 1009062), (24, 840885), (30, 672708), (36, 560590), (40, 504531), (45, 448472), (60, 336354), (61, 330840), (72, 280295), (90, 224236), (120, 168177), (122, 165420), (180, 112118), (183, 110280), (244, 82710), (305, 66168), (360, 56059), (366, 55140), (488, 41355), (549, 36760), (610, 33084), (732, 27570), (915, 22056), (919, 21960), (1098, 18380), (1220, 16542), (1464, 13785), (1830, 11028), (1838, 10980), (2196, 9190), (2440, 8271), (2745, 7352), (2757, 7320), (3660, 5514), (3676, 5490), (4392, 4595)]