21491379

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{8747}}^1$

素因数の和:8776

約数の個数: 32

約数和(自身を含む): 39191040

約数和(自身を除く): 17699661

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 189, 273, 351, 819, 2457, 8747, 26241, 61229, 78723, 113711, 183687, 236169, 341133, 551061, 795977, 1023399, 1653183, 2387931, 3070197, 7163793, 21491379]

約数ペア:

[(1, 21491379), (3, 7163793), (7, 3070197), (9, 2387931), (13, 1653183), (21, 1023399), (27, 795977), (39, 551061), (63, 341133), (91, 236169), (117, 183687), (189, 113711), (273, 78723), (351, 61229), (819, 26241), (2457, 8747)]