21312590

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12611}}^1$

素因数の和:12644

約数の個数: 24

約数和(自身を含む): 41543928

約数和(自身を除く): 20231338

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12611, 25222, 63055, 126110, 163943, 327886, 819715, 1639430, 2131259, 4262518, 10656295, 21312590]

約数ペア:

[(1, 21312590), (2, 10656295), (5, 4262518), (10, 2131259), (13, 1639430), (26, 819715), (65, 327886), (130, 163943), (169, 126110), (338, 63055), (845, 25222), (1690, 12611)]