20680075

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1$

素因数の和:256

約数の個数: 48

約数和(自身を含む): 30935520

約数和(自身を除く): 10255445

約数列:

[1, 5, 13, 17, 19, 25, 65, 85, 95, 197, 221, 247, 323, 325, 425, 475, 985, 1105, 1235, 1615, 2561, 3349, 3743, 4199, 4925, 5525, 6175, 8075, 12805, 16745, 18715, 20995, 43537, 48659, 63631, 64025, 83725, 93575, 104975, 217685, 243295, 318155, 827203, 1088425, 1216475, 1590775, 4136015, 20680075]

約数ペア:

[(1, 20680075), (5, 4136015), (13, 1590775), (17, 1216475), (19, 1088425), (25, 827203), (65, 318155), (85, 243295), (95, 217685), (197, 104975), (221, 93575), (247, 83725), (323, 64025), (325, 63631), (425, 48659), (475, 43537), (985, 20995), (1105, 18715), (1235, 16745), (1615, 12805), (2561, 8075), (3349, 6175), (3743, 5525), (4199, 4925)]