19398440

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5449}}^1$

素因数の和:5549

約数の個数: 32

約数和(自身を含む): 44145000

約数和(自身を除く): 24746560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5449, 10898, 21796, 27245, 43592, 54490, 108980, 217960, 484961, 969922, 1939844, 2424805, 3879688, 4849610, 9699220, 19398440]

約数ペア:

[(1, 19398440), (2, 9699220), (4, 4849610), (5, 3879688), (8, 2424805), (10, 1939844), (20, 969922), (40, 484961), (89, 217960), (178, 108980), (356, 54490), (445, 43592), (712, 27245), (890, 21796), (1780, 10898), (3560, 5449)]