21315918

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{273281}}^1$

素因数の和:273299

約数の個数: 16

約数和(自身を含む): 45911376

約数和(自身を除く): 24595458

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 273281, 546562, 819843, 1639686, 3552653, 7105306, 10657959, 21315918]

約数ペア:

[(1, 21315918), (2, 10657959), (3, 7105306), (6, 3552653), (13, 1639686), (26, 819843), (39, 546562), (78, 273281)]