20953988

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{211}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 41955648

約数和(自身を除く): 21001660

約数列:

[1, 2, 4, 11, 22, 37, 44, 61, 74, 122, 148, 211, 244, 407, 422, 671, 814, 844, 1342, 1628, 2257, 2321, 2684, 4514, 4642, 7807, 9028, 9284, 12871, 15614, 24827, 25742, 31228, 49654, 51484, 85877, 99308, 141581, 171754, 283162, 343508, 476227, 566324, 952454, 1904908, 5238497, 10476994, 20953988]

約数ペア:

[(1, 20953988), (2, 10476994), (4, 5238497), (11, 1904908), (22, 952454), (37, 566324), (44, 476227), (61, 343508), (74, 283162), (122, 171754), (148, 141581), (211, 99308), (244, 85877), (407, 51484), (422, 49654), (671, 31228), (814, 25742), (844, 24827), (1342, 15614), (1628, 12871), (2257, 9284), (2321, 9028), (2684, 7807), (4514, 4642)]