20003555

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{277}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 28582848

約数和(自身を除く): 8579293

約数列:

[1, 5, 11, 13, 55, 65, 101, 143, 277, 505, 715, 1111, 1313, 1385, 3047, 3601, 5555, 6565, 14443, 15235, 18005, 27977, 39611, 72215, 139885, 198055, 307747, 363701, 1538735, 1818505, 4000711, 20003555]

約数ペア:

[(1, 20003555), (5, 4000711), (11, 1818505), (13, 1538735), (55, 363701), (65, 307747), (101, 198055), (143, 139885), (277, 72215), (505, 39611), (715, 27977), (1111, 18005), (1313, 15235), (1385, 14443), (3047, 6565), (3601, 5555)]