21171620

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1\times {\mathrm{223}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 46061568

約数和(自身を除く): 24889948

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 101, 188, 202, 223, 235, 404, 446, 470, 505, 892, 940, 1010, 1115, 2020, 2230, 4460, 4747, 9494, 10481, 18988, 20962, 22523, 23735, 41924, 45046, 47470, 52405, 90092, 94940, 104810, 112615, 209620, 225230, 450460, 1058581, 2117162, 4234324, 5292905, 10585810, 21171620]

約数ペア:

[(1, 21171620), (2, 10585810), (4, 5292905), (5, 4234324), (10, 2117162), (20, 1058581), (47, 450460), (94, 225230), (101, 209620), (188, 112615), (202, 104810), (223, 94940), (235, 90092), (404, 52405), (446, 47470), (470, 45046), (505, 41924), (892, 23735), (940, 22523), (1010, 20962), (1115, 18988), (2020, 10481), (2230, 9494), (4460, 4747)]