20388580

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{349}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 45158400

約数和(自身を除く): 24769820

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 127, 230, 254, 349, 460, 508, 635, 698, 1270, 1396, 1745, 2540, 2921, 3490, 5842, 6980, 8027, 11684, 14605, 16054, 29210, 32108, 40135, 44323, 58420, 80270, 88646, 160540, 177292, 221615, 443230, 886460, 1019429, 2038858, 4077716, 5097145, 10194290, 20388580]

約数ペア:

[(1, 20388580), (2, 10194290), (4, 5097145), (5, 4077716), (10, 2038858), (20, 1019429), (23, 886460), (46, 443230), (92, 221615), (115, 177292), (127, 160540), (230, 88646), (254, 80270), (349, 58420), (460, 44323), (508, 40135), (635, 32108), (698, 29210), (1270, 16054), (1396, 14605), (1745, 11684), (2540, 8027), (2921, 6980), (3490, 5842)]