21531315

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{1013}}^1$

素因数の和:1143

約数の個数: 32

約数和(自身を含む): 37477440

約数和(自身を除く): 15946125

約数列:

[1, 3, 5, 13, 15, 39, 65, 109, 195, 327, 545, 1013, 1417, 1635, 3039, 4251, 5065, 7085, 13169, 15195, 21255, 39507, 65845, 110417, 197535, 331251, 552085, 1435421, 1656255, 4306263, 7177105, 21531315]

約数ペア:

[(1, 21531315), (3, 7177105), (5, 4306263), (13, 1656255), (15, 1435421), (39, 552085), (65, 331251), (109, 197535), (195, 110417), (327, 65845), (545, 39507), (1013, 21255), (1417, 15195), (1635, 13169), (3039, 7085), (4251, 5065)]