21278049

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{5297}}^1$

素因数の和:5416

約数の個数: 16

約数和(自身を含む): 30855552

約数和(自身を除く): 9577503

約数列:

[1, 3, 13, 39, 103, 309, 1339, 4017, 5297, 15891, 68861, 206583, 545591, 1636773, 7092683, 21278049]

約数ペア:

[(1, 21278049), (3, 7092683), (13, 1636773), (39, 545591), (103, 206583), (309, 68861), (1339, 15891), (4017, 5297)]