21319508

素因数分解:

$2^2\times 7^3\times {\mathrm{41}}^1\times {\mathrm{379}}^1$

素因数の和:445

約数の個数: 48

約数和(自身を含む): 44688000

約数和(自身を除く): 23368492

約数列:

[1, 2, 4, 7, 14, 28, 41, 49, 82, 98, 164, 196, 287, 343, 379, 574, 686, 758, 1148, 1372, 1516, 2009, 2653, 4018, 5306, 8036, 10612, 14063, 15539, 18571, 28126, 31078, 37142, 56252, 62156, 74284, 108773, 129997, 217546, 259994, 435092, 519988, 761411, 1522822, 3045644, 5329877, 10659754, 21319508]

約数ペア:

[(1, 21319508), (2, 10659754), (4, 5329877), (7, 3045644), (14, 1522822), (28, 761411), (41, 519988), (49, 435092), (82, 259994), (98, 217546), (164, 129997), (196, 108773), (287, 74284), (343, 62156), (379, 56252), (574, 37142), (686, 31078), (758, 28126), (1148, 18571), (1372, 15539), (1516, 14063), (2009, 10612), (2653, 8036), (4018, 5306)]