21281290

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{509}}^1$

素因数の和:666

約数の個数: 32

約数和(自身を含む): 39767760

約数和(自身を除く): 18486470

約数列:

[1, 2, 5, 10, 37, 74, 113, 185, 226, 370, 509, 565, 1018, 1130, 2545, 4181, 5090, 8362, 18833, 20905, 37666, 41810, 57517, 94165, 115034, 188330, 287585, 575170, 2128129, 4256258, 10640645, 21281290]

約数ペア:

[(1, 21281290), (2, 10640645), (5, 4256258), (10, 2128129), (37, 575170), (74, 287585), (113, 188330), (185, 115034), (226, 94165), (370, 57517), (509, 41810), (565, 37666), (1018, 20905), (1130, 18833), (2545, 8362), (4181, 5090)]