21131994845

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{280507}}^1$

素因数の和:280605

約数の個数: 32

約数和(自身を含む): 29217713280

約数和(自身を除く): 8085718435

約数列:

[1, 5, 13, 19, 61, 65, 95, 247, 305, 793, 1159, 1235, 3965, 5795, 15067, 75335, 280507, 1402535, 3646591, 5329633, 17110927, 18232955, 26648165, 69285229, 85554635, 222442051, 325107613, 346426145, 1112210255, 1625538065, 4226398969, 21131994845]

約数ペア:

[(1, 21131994845), (5, 4226398969), (13, 1625538065), (19, 1112210255), (61, 346426145), (65, 325107613), (95, 222442051), (247, 85554635), (305, 69285229), (793, 26648165), (1159, 18232955), (1235, 17110927), (3965, 5329633), (5795, 3646591), (15067, 1402535), (75335, 280507)]