19398920

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3089}}^1$

素因数の和:3257

約数の個数: 32

約数和(自身を含む): 43939800

約数和(自身を除く): 24540880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3089, 3140, 6178, 6280, 12356, 15445, 24712, 30890, 61780, 123560, 484973, 969946, 1939892, 2424865, 3879784, 4849730, 9699460, 19398920]

約数ペア:

[(1, 19398920), (2, 9699460), (4, 4849730), (5, 3879784), (8, 2424865), (10, 1939892), (20, 969946), (40, 484973), (157, 123560), (314, 61780), (628, 30890), (785, 24712), (1256, 15445), (1570, 12356), (3089, 6280), (3140, 6178)]