21128980465

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{521}}^1\times {\mathrm{261643}}^1$

素因数の和:262200

約数の個数: 16

約数和(自身を含む): 26223008256

約数和(自身を除く): 5094027791

約数列:

[1, 5, 31, 155, 521, 2605, 16151, 80755, 261643, 1308215, 8110933, 40554665, 136316003, 681580015, 4225796093, 21128980465]

約数ペア:

[(1, 21128980465), (5, 4225796093), (31, 681580015), (155, 136316003), (521, 40554665), (2605, 8110933), (16151, 1308215), (80755, 261643)]