21397948

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37409}}^1$

素因数の和:37437

約数の個数: 24

約数和(自身を含む): 43994160

約数和(自身を除く): 22596212

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 143, 286, 572, 37409, 74818, 149636, 411499, 486317, 822998, 972634, 1645996, 1945268, 5349487, 10698974, 21397948]

約数ペア:

[(1, 21397948), (2, 10698974), (4, 5349487), (11, 1945268), (13, 1645996), (22, 972634), (26, 822998), (44, 486317), (52, 411499), (143, 149636), (286, 74818), (572, 37409)]