19780448

素因数分解:

$2^5\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{109}}^1$

素因数の和:279

約数の個数: 48

約数和(自身を含む): 40415760

約数和(自身を除く): 20635312

約数列:

[1, 2, 4, 8, 16, 32, 53, 106, 107, 109, 212, 214, 218, 424, 428, 436, 848, 856, 872, 1696, 1712, 1744, 3424, 3488, 5671, 5777, 11342, 11554, 11663, 22684, 23108, 23326, 45368, 46216, 46652, 90736, 92432, 93304, 181472, 184864, 186608, 373216, 618139, 1236278, 2472556, 4945112, 9890224, 19780448]

約数ペア:

[(1, 19780448), (2, 9890224), (4, 4945112), (8, 2472556), (16, 1236278), (32, 618139), (53, 373216), (106, 186608), (107, 184864), (109, 181472), (212, 93304), (214, 92432), (218, 90736), (424, 46652), (428, 46216), (436, 45368), (848, 23326), (856, 23108), (872, 22684), (1696, 11663), (1712, 11554), (1744, 11342), (3424, 5777), (3488, 5671)]