21901243

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7129157

約数列:

[1, 7, 13, 19, 53, 91, 133, 239, 247, 371, 689, 1007, 1673, 1729, 3107, 4541, 4823, 7049, 12667, 13091, 21749, 31787, 59033, 88669, 91637, 164671, 240673, 413231, 1152697, 1684711, 3128749, 21901243]

約数ペア:

[(1, 21901243), (7, 3128749), (13, 1684711), (19, 1152697), (53, 413231), (91, 240673), (133, 164671), (239, 91637), (247, 88669), (371, 59033), (689, 31787), (1007, 21749), (1673, 13091), (1729, 12667), (3107, 7049), (4541, 4823)]