21587820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1087}}^1$

素因数の和:1430

約数の個数: 48

約数和(自身を含む): 60684288

約数和(自身を除く): 39096468

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 331, 662, 993, 1087, 1324, 1655, 1986, 2174, 3261, 3310, 3972, 4348, 4965, 5435, 6522, 6620, 9930, 10870, 13044, 16305, 19860, 21740, 32610, 65220, 359797, 719594, 1079391, 1439188, 1798985, 2158782, 3597970, 4317564, 5396955, 7195940, 10793910, 21587820]

約数ペア:

[(1, 21587820), (2, 10793910), (3, 7195940), (4, 5396955), (5, 4317564), (6, 3597970), (10, 2158782), (12, 1798985), (15, 1439188), (20, 1079391), (30, 719594), (60, 359797), (331, 65220), (662, 32610), (993, 21740), (1087, 19860), (1324, 16305), (1655, 13044), (1986, 10870), (2174, 9930), (3261, 6620), (3310, 6522), (3972, 5435), (4348, 4965)]