21965307

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{1319}}^1$

素因数の和:1403

約数の個数: 32

約数和(自身を含む): 36664320

約数和(自身を除く): 14699013

約数列:

[1, 3, 7, 13, 21, 39, 61, 91, 183, 273, 427, 793, 1281, 1319, 2379, 3957, 5551, 9233, 16653, 17147, 27699, 51441, 80459, 120029, 241377, 360087, 563213, 1045967, 1689639, 3137901, 7321769, 21965307]

約数ペア:

[(1, 21965307), (3, 7321769), (7, 3137901), (13, 1689639), (21, 1045967), (39, 563213), (61, 360087), (91, 241377), (183, 120029), (273, 80459), (427, 51441), (793, 27699), (1281, 17147), (1319, 16653), (2379, 9233), (3957, 5551)]