19128380

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{15679}}^1$

素因数の和:15749

約数の個数: 24

約数和(自身を含む): 40830720

約数和(自身を除く): 21702340

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 15679, 31358, 62716, 78395, 156790, 313580, 956419, 1912838, 3825676, 4782095, 9564190, 19128380]

約数ペア:

[(1, 19128380), (2, 9564190), (4, 4782095), (5, 3825676), (10, 1912838), (20, 956419), (61, 313580), (122, 156790), (244, 78395), (305, 62716), (610, 31358), (1220, 15679)]