19919205

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:282

約数の個数: 48

約数和(自身を含む): 36241920

約数和(自身を除く): 16322715

約数列:

[1, 3, 5, 9, 15, 31, 45, 93, 109, 131, 155, 279, 327, 393, 465, 545, 655, 981, 1179, 1395, 1635, 1965, 3379, 4061, 4905, 5895, 10137, 12183, 14279, 16895, 20305, 30411, 36549, 42837, 50685, 60915, 71395, 128511, 152055, 182745, 214185, 442649, 642555, 1327947, 2213245, 3983841, 6639735, 19919205]

約数ペア:

[(1, 19919205), (3, 6639735), (5, 3983841), (9, 2213245), (15, 1327947), (31, 642555), (45, 442649), (93, 214185), (109, 182745), (131, 152055), (155, 128511), (279, 71395), (327, 60915), (393, 50685), (465, 42837), (545, 36549), (655, 30411), (981, 20305), (1179, 16895), (1395, 14279), (1635, 12183), (1965, 10137), (3379, 5895), (4061, 4905)]