21511028

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{331}}^1$

素因数の和:564

約数の個数: 48

約数和(自身を含む): 47298048

約数和(自身を除く): 25787020

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 211, 308, 331, 422, 662, 844, 1324, 1477, 2317, 2321, 2954, 3641, 4634, 4642, 5908, 7282, 9268, 9284, 14564, 16247, 25487, 32494, 50974, 64988, 69841, 101948, 139682, 279364, 488887, 768251, 977774, 1536502, 1955548, 3073004, 5377757, 10755514, 21511028]

約数ペア:

[(1, 21511028), (2, 10755514), (4, 5377757), (7, 3073004), (11, 1955548), (14, 1536502), (22, 977774), (28, 768251), (44, 488887), (77, 279364), (154, 139682), (211, 101948), (308, 69841), (331, 64988), (422, 50974), (662, 32494), (844, 25487), (1324, 16247), (1477, 14564), (2317, 9284), (2321, 9268), (2954, 7282), (3641, 5908), (4634, 4642)]