21921123

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{223}}^1$

素因数の和:415

約数の個数: 32

約数和(自身を含む): 34865152

約数和(自身を除く): 12944029

約数列:

[1, 3, 7, 21, 31, 93, 151, 217, 223, 453, 651, 669, 1057, 1561, 3171, 4681, 4683, 6913, 14043, 20739, 32767, 33673, 48391, 98301, 101019, 145173, 235711, 707133, 1043863, 3131589, 7307041, 21921123]

約数ペア:

[(1, 21921123), (3, 7307041), (7, 3131589), (21, 1043863), (31, 707133), (93, 235711), (151, 145173), (217, 101019), (223, 98301), (453, 48391), (651, 33673), (669, 32767), (1057, 20739), (1561, 14043), (3171, 6913), (4681, 4683)]