221528391

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{555209}}^1$

素因数の和:555238

約数の個数: 16

約数和(自身を含む): 355334400

約数和(自身を除く): 133806009

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 555209, 1665627, 3886463, 10548971, 11659389, 31646913, 73842797, 221528391]

約数ペア:

[(1, 221528391), (3, 73842797), (7, 31646913), (19, 11659389), (21, 10548971), (57, 3886463), (133, 1665627), (399, 555209)]