21661263

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{6857}}^1$

素因数の和:6885

約数の個数: 24

約数和(自身を含む): 34948368

約数和(自身を除く): 13287105

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 243, 351, 1053, 3159, 6857, 20571, 61713, 89141, 185139, 267423, 555417, 802269, 1666251, 2406807, 7220421, 21661263]

約数ペア:

[(1, 21661263), (3, 7220421), (9, 2406807), (13, 1666251), (27, 802269), (39, 555417), (81, 267423), (117, 185139), (243, 89141), (351, 61713), (1053, 20571), (3159, 6857)]