20008235

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{953}}^1$

素因数の和:1007

約数の個数: 32

約数和(自身を含む): 28848960

約数和(自身を除く): 8840725

約数列:

[1, 5, 13, 17, 19, 65, 85, 95, 221, 247, 323, 953, 1105, 1235, 1615, 4199, 4765, 12389, 16201, 18107, 20995, 61945, 81005, 90535, 210613, 235391, 307819, 1053065, 1176955, 1539095, 4001647, 20008235]

約数ペア:

[(1, 20008235), (5, 4001647), (13, 1539095), (17, 1176955), (19, 1053065), (65, 307819), (85, 235391), (95, 210613), (221, 90535), (247, 81005), (323, 61945), (953, 20995), (1105, 18107), (1235, 16201), (1615, 12389), (4199, 4765)]