18807815

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 26013120

約数和(自身を除く): 7205305

約数列:

[1, 5, 13, 19, 65, 95, 97, 157, 247, 485, 785, 1235, 1261, 1843, 2041, 2983, 6305, 9215, 10205, 14915, 15229, 23959, 38779, 76145, 119795, 193895, 197977, 289351, 989885, 1446755, 3761563, 18807815]

約数ペア:

[(1, 18807815), (5, 3761563), (13, 1446755), (19, 989885), (65, 289351), (95, 197977), (97, 193895), (157, 119795), (247, 76145), (485, 38779), (785, 23959), (1235, 15229), (1261, 14915), (1843, 10205), (2041, 9215), (2983, 6305)]