19805456

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{2617}}^1$

素因数の和:2679

約数の個数: 40

約数和(自身を含む): 42851424

約数和(自身を除く): 23045968

約数列:

[1, 2, 4, 8, 11, 16, 22, 43, 44, 86, 88, 172, 176, 344, 473, 688, 946, 1892, 2617, 3784, 5234, 7568, 10468, 20936, 28787, 41872, 57574, 112531, 115148, 225062, 230296, 450124, 460592, 900248, 1237841, 1800496, 2475682, 4951364, 9902728, 19805456]

約数ペア:

[(1, 19805456), (2, 9902728), (4, 4951364), (8, 2475682), (11, 1800496), (16, 1237841), (22, 900248), (43, 460592), (44, 450124), (86, 230296), (88, 225062), (172, 115148), (176, 112531), (344, 57574), (473, 41872), (688, 28787), (946, 20936), (1892, 10468), (2617, 7568), (3784, 5234)]