989718860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{21031}}^1$

素因数の和:21234

約数の個数: 48

約数和(自身を含む): 2250760512

約数和(自身を除く): 1261041652

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 181, 260, 362, 724, 905, 1810, 2353, 3620, 4706, 9412, 11765, 21031, 23530, 42062, 47060, 84124, 105155, 210310, 273403, 420620, 546806, 1093612, 1367015, 2734030, 3806611, 5468060, 7613222, 15226444, 19033055, 38066110, 49485943, 76132220, 98971886, 197943772, 247429715, 494859430, 989718860]

約数ペア:

[(1, 989718860), (2, 494859430), (4, 247429715), (5, 197943772), (10, 98971886), (13, 76132220), (20, 49485943), (26, 38066110), (52, 19033055), (65, 15226444), (130, 7613222), (181, 5468060), (260, 3806611), (362, 2734030), (724, 1367015), (905, 1093612), (1810, 546806), (2353, 420620), (3620, 273403), (4706, 210310), (9412, 105155), (11765, 84124), (21031, 47060), (23530, 42062)]