19927280

素因数分解:

$2^4\times 5^1\times {\mathrm{223}}^1\times {\mathrm{1117}}^1$

素因数の和:1353

約数の個数: 40

約数和(自身を含む): 46580352

約数和(自身を除く): 26653072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 223, 446, 892, 1115, 1117, 1784, 2230, 2234, 3568, 4460, 4468, 5585, 8920, 8936, 11170, 17840, 17872, 22340, 44680, 89360, 249091, 498182, 996364, 1245455, 1992728, 2490910, 3985456, 4981820, 9963640, 19927280]

約数ペア:

[(1, 19927280), (2, 9963640), (4, 4981820), (5, 3985456), (8, 2490910), (10, 1992728), (16, 1245455), (20, 996364), (40, 498182), (80, 249091), (223, 89360), (446, 44680), (892, 22340), (1115, 17872), (1117, 17840), (1784, 11170), (2230, 8936), (2234, 8920), (3568, 5585), (4460, 4468)]