19697968

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{521}}^1$

素因数の和:685

約数の個数: 40

約数和(自身を含む): 40778640

約数和(自身を除く): 21080672

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 139, 272, 278, 521, 556, 1042, 1112, 2084, 2224, 2363, 4168, 4726, 8336, 8857, 9452, 17714, 18904, 35428, 37808, 70856, 72419, 141712, 144838, 289676, 579352, 1158704, 1231123, 2462246, 4924492, 9848984, 19697968]

約数ペア:

[(1, 19697968), (2, 9848984), (4, 4924492), (8, 2462246), (16, 1231123), (17, 1158704), (34, 579352), (68, 289676), (136, 144838), (139, 141712), (272, 72419), (278, 70856), (521, 37808), (556, 35428), (1042, 18904), (1112, 17714), (2084, 9452), (2224, 8857), (2363, 8336), (4168, 4726)]