20127745

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 29877120

約数和(自身を除く): 9749375

約数列:

[1, 5, 11, 17, 19, 55, 85, 95, 103, 121, 187, 209, 323, 515, 605, 935, 1045, 1133, 1615, 1751, 1957, 2057, 2299, 3553, 5665, 8755, 9785, 10285, 11495, 12463, 17765, 19261, 21527, 33269, 39083, 62315, 96305, 107635, 166345, 195415, 211871, 236797, 365959, 1059355, 1183985, 1829795, 4025549, 20127745]

約数ペア:

[(1, 20127745), (5, 4025549), (11, 1829795), (17, 1183985), (19, 1059355), (55, 365959), (85, 236797), (95, 211871), (103, 195415), (121, 166345), (187, 107635), (209, 96305), (323, 62315), (515, 39083), (605, 33269), (935, 21527), (1045, 19261), (1133, 17765), (1615, 12463), (1751, 11495), (1957, 10285), (2057, 9785), (2299, 8755), (3553, 5665)]