21278010

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54559}}^1$

素因数の和:54582

約数の個数: 32

約数和(自身を含む): 54996480

約数和(自身を除く): 33718470

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 54559, 109118, 163677, 272795, 327354, 545590, 709267, 818385, 1418534, 1636770, 2127801, 3546335, 4255602, 7092670, 10639005, 21278010]

約数ペア:

[(1, 21278010), (2, 10639005), (3, 7092670), (5, 4255602), (6, 3546335), (10, 2127801), (13, 1636770), (15, 1418534), (26, 818385), (30, 709267), (39, 545590), (65, 327354), (78, 272795), (130, 163677), (195, 109118), (390, 54559)]