21007948

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{13931}}^1$

素因数の和:13977

約数の個数: 24

約数和(自身を含む): 40960080

約数和(自身を除く): 19952132

約数列:

[1, 2, 4, 13, 26, 29, 52, 58, 116, 377, 754, 1508, 13931, 27862, 55724, 181103, 362206, 403999, 724412, 807998, 1615996, 5251987, 10503974, 21007948]

約数ペア:

[(1, 21007948), (2, 10503974), (4, 5251987), (13, 1615996), (26, 807998), (29, 724412), (52, 403999), (58, 362206), (116, 181103), (377, 55724), (754, 27862), (1508, 13931)]