19943120

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2801}}^1$

素因数の和:2903

約数の個数: 40

約数和(自身を含む): 46905480

約数和(自身を除く): 26962360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2801, 3560, 5602, 7120, 11204, 14005, 22408, 28010, 44816, 56020, 112040, 224080, 249289, 498578, 997156, 1246445, 1994312, 2492890, 3988624, 4985780, 9971560, 19943120]

約数ペア:

[(1, 19943120), (2, 9971560), (4, 4985780), (5, 3988624), (8, 2492890), (10, 1994312), (16, 1246445), (20, 997156), (40, 498578), (80, 249289), (89, 224080), (178, 112040), (356, 56020), (445, 44816), (712, 28010), (890, 22408), (1424, 14005), (1780, 11204), (2801, 7120), (3560, 5602)]