21292180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11699}}^1$

素因数の和:11728

約数の個数: 48

約数和(自身を含む): 55036800

約数和(自身を除く): 33744620

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11699, 23398, 46796, 58495, 81893, 116990, 152087, 163786, 233980, 304174, 327572, 409465, 608348, 760435, 818930, 1064609, 1520870, 1637860, 2129218, 3041740, 4258436, 5323045, 10646090, 21292180]

約数ペア:

[(1, 21292180), (2, 10646090), (4, 5323045), (5, 4258436), (7, 3041740), (10, 2129218), (13, 1637860), (14, 1520870), (20, 1064609), (26, 818930), (28, 760435), (35, 608348), (52, 409465), (65, 327572), (70, 304174), (91, 233980), (130, 163786), (140, 152087), (182, 116990), (260, 81893), (364, 58495), (455, 46796), (910, 23398), (1820, 11699)]