21049390

素因数分解:

$2^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{353}}^1$

素因数の和:516

約数の個数: 32

約数和(自身を含む): 38996640

約数和(自身を除く): 17947250

約数列:

[1, 2, 5, 10, 67, 89, 134, 178, 335, 353, 445, 670, 706, 890, 1765, 3530, 5963, 11926, 23651, 29815, 31417, 47302, 59630, 62834, 118255, 157085, 236510, 314170, 2104939, 4209878, 10524695, 21049390]

約数ペア:

[(1, 21049390), (2, 10524695), (5, 4209878), (10, 2104939), (67, 314170), (89, 236510), (134, 157085), (178, 118255), (335, 62834), (353, 59630), (445, 47302), (670, 31417), (706, 29815), (890, 23651), (1765, 11926), (3530, 5963)]