21645819

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{743}}^1$

素因数の和:848

約数の個数: 32

約数和(自身を含む): 34997760

約数和(自身を除く): 13351941

約数列:

[1, 3, 9, 13, 27, 39, 83, 117, 249, 351, 743, 747, 1079, 2229, 2241, 3237, 6687, 9659, 9711, 20061, 28977, 29133, 61669, 86931, 185007, 260793, 555021, 801697, 1665063, 2405091, 7215273, 21645819]

約数ペア:

[(1, 21645819), (3, 7215273), (9, 2405091), (13, 1665063), (27, 801697), (39, 555021), (83, 260793), (117, 185007), (249, 86931), (351, 61669), (743, 29133), (747, 28977), (1079, 20061), (2229, 9711), (2241, 9659), (3237, 6687)]