21109972

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{1297}}^1$

素因数の和:1627

約数の個数: 24

約数和(自身を含む): 39942056

約数和(自身を除く): 18832084

約数列:

[1, 2, 4, 13, 26, 52, 313, 626, 1252, 1297, 2594, 4069, 5188, 8138, 16276, 16861, 33722, 67444, 405961, 811922, 1623844, 5277493, 10554986, 21109972]

約数ペア:

[(1, 21109972), (2, 10554986), (4, 5277493), (13, 1623844), (26, 811922), (52, 405961), (313, 67444), (626, 33722), (1252, 16861), (1297, 16276), (2594, 8138), (4069, 5188)]