19778470

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{313}}^1$

素因数の和:480

約数の個数: 32

約数和(自身を含む): 36624960

約数和(自身を除く): 16846490

約数列:

[1, 2, 5, 10, 71, 89, 142, 178, 313, 355, 445, 626, 710, 890, 1565, 3130, 6319, 12638, 22223, 27857, 31595, 44446, 55714, 63190, 111115, 139285, 222230, 278570, 1977847, 3955694, 9889235, 19778470]

約数ペア:

[(1, 19778470), (2, 9889235), (5, 3955694), (10, 1977847), (71, 278570), (89, 222230), (142, 139285), (178, 111115), (313, 63190), (355, 55714), (445, 44446), (626, 31595), (710, 27857), (890, 22223), (1565, 12638), (3130, 6319)]