21456015

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1609}}^1$

素因数の和:1751

約数の個数: 32

約数和(自身を含む): 39567360

約数和(自身を除く): 18111345

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 127, 381, 635, 889, 1609, 1905, 2667, 4445, 4827, 8045, 11263, 13335, 24135, 33789, 56315, 168945, 204343, 613029, 1021715, 1430401, 3065145, 4291203, 7152005, 21456015]

約数ペア:

[(1, 21456015), (3, 7152005), (5, 4291203), (7, 3065145), (15, 1430401), (21, 1021715), (35, 613029), (105, 204343), (127, 168945), (381, 56315), (635, 33789), (889, 24135), (1609, 13335), (1905, 11263), (2667, 8045), (4445, 4827)]