21263505

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{30161}}^1$

素因数の和:30216

約数の個数: 16

約数和(自身を含む): 34746624

約数和(自身を除く): 13483119

約数列:

[1, 3, 5, 15, 47, 141, 235, 705, 30161, 90483, 150805, 452415, 1417567, 4252701, 7087835, 21263505]

約数ペア:

[(1, 21263505), (3, 7087835), (5, 4252701), (15, 1417567), (47, 452415), (141, 150805), (235, 90483), (705, 30161)]