21031740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{353}}^1$

素因数の和:699

約数の個数: 72

約数和(自身を含む): 64170288

約数和(自身を除く): 43138548

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 331, 353, 662, 706, 993, 1059, 1324, 1412, 1655, 1765, 1986, 2118, 2979, 3177, 3310, 3530, 3972, 4236, 4965, 5295, 5958, 6354, 6620, 7060, 9930, 10590, 11916, 12708, 14895, 15885, 19860, 21180, 29790, 31770, 59580, 63540, 116843, 233686, 350529, 467372, 584215, 701058, 1051587, 1168430, 1402116, 1752645, 2103174, 2336860, 3505290, 4206348, 5257935, 7010580, 10515870, 21031740]

約数ペア:

[(1, 21031740), (2, 10515870), (3, 7010580), (4, 5257935), (5, 4206348), (6, 3505290), (9, 2336860), (10, 2103174), (12, 1752645), (15, 1402116), (18, 1168430), (20, 1051587), (30, 701058), (36, 584215), (45, 467372), (60, 350529), (90, 233686), (180, 116843), (331, 63540), (353, 59580), (662, 31770), (706, 29790), (993, 21180), (1059, 19860), (1324, 15885), (1412, 14895), (1655, 12708), (1765, 11916), (1986, 10590), (2118, 9930), (2979, 7060), (3177, 6620), (3310, 6354), (3530, 5958), (3972, 5295), (4236, 4965)]