20156978515

素因数分解:

$5^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1\times {\mathrm{241}}^1\times {\mathrm{857}}^1$

素因数の和:1383

約数の個数: 32

約数和(自身を含む): 24667156800

約数和(自身を除く): 4510178285

約数列:

[1, 5, 131, 149, 241, 655, 745, 857, 1205, 4285, 19519, 31571, 35909, 97595, 112267, 127693, 157855, 179545, 206537, 561335, 638465, 1032685, 4704079, 16727783, 23520395, 27056347, 30774013, 83638915, 135281735, 153870065, 4031395703, 20156978515]

約数ペア:

[(1, 20156978515), (5, 4031395703), (131, 153870065), (149, 135281735), (241, 83638915), (655, 30774013), (745, 27056347), (857, 23520395), (1205, 16727783), (4285, 4704079), (19519, 1032685), (31571, 638465), (35909, 561335), (97595, 206537), (112267, 179545), (127693, 157855)]