21500880

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{887}}^1$

素因数の和:1004

約数の個数: 80

約数和(自身を含む): 67388544

約数和(自身を除く): 45887664

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 101, 120, 202, 240, 303, 404, 505, 606, 808, 887, 1010, 1212, 1515, 1616, 1774, 2020, 2424, 2661, 3030, 3548, 4040, 4435, 4848, 5322, 6060, 7096, 8080, 8870, 10644, 12120, 13305, 14192, 17740, 21288, 24240, 26610, 35480, 42576, 53220, 70960, 89587, 106440, 179174, 212880, 268761, 358348, 447935, 537522, 716696, 895870, 1075044, 1343805, 1433392, 1791740, 2150088, 2687610, 3583480, 4300176, 5375220, 7166960, 10750440, 21500880]

約数ペア:

[(1, 21500880), (2, 10750440), (3, 7166960), (4, 5375220), (5, 4300176), (6, 3583480), (8, 2687610), (10, 2150088), (12, 1791740), (15, 1433392), (16, 1343805), (20, 1075044), (24, 895870), (30, 716696), (40, 537522), (48, 447935), (60, 358348), (80, 268761), (101, 212880), (120, 179174), (202, 106440), (240, 89587), (303, 70960), (404, 53220), (505, 42576), (606, 35480), (808, 26610), (887, 24240), (1010, 21288), (1212, 17740), (1515, 14192), (1616, 13305), (1774, 12120), (2020, 10644), (2424, 8870), (2661, 8080), (3030, 7096), (3548, 6060), (4040, 5322), (4435, 4848)]