20512115

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{977}}^1$

素因数の和:1031

約数の個数: 32

約数和(自身を含む): 29574720

約数和(自身を除く): 9062605

約数列:

[1, 5, 13, 17, 19, 65, 85, 95, 221, 247, 323, 977, 1105, 1235, 1615, 4199, 4885, 12701, 16609, 18563, 20995, 63505, 83045, 92815, 215917, 241319, 315571, 1079585, 1206595, 1577855, 4102423, 20512115]

約数ペア:

[(1, 20512115), (5, 4102423), (13, 1577855), (17, 1206595), (19, 1079585), (65, 315571), (85, 241319), (95, 215917), (221, 92815), (247, 83045), (323, 63505), (977, 20995), (1105, 18563), (1235, 16609), (1615, 12701), (4199, 4885)]