20999180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{757}}^1$

素因数の和:858

約数の個数: 48

約数和(自身を含む): 47117280

約数和(自身を除く): 26118100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 73, 76, 95, 146, 190, 292, 365, 380, 730, 757, 1387, 1460, 1514, 2774, 3028, 3785, 5548, 6935, 7570, 13870, 14383, 15140, 27740, 28766, 55261, 57532, 71915, 110522, 143830, 221044, 276305, 287660, 552610, 1049959, 1105220, 2099918, 4199836, 5249795, 10499590, 20999180]

約数ペア:

[(1, 20999180), (2, 10499590), (4, 5249795), (5, 4199836), (10, 2099918), (19, 1105220), (20, 1049959), (38, 552610), (73, 287660), (76, 276305), (95, 221044), (146, 143830), (190, 110522), (292, 71915), (365, 57532), (380, 55261), (730, 28766), (757, 27740), (1387, 15140), (1460, 14383), (1514, 13870), (2774, 7570), (3028, 6935), (3785, 5548)]