18994480

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{5791}}^1$

素因数の和:5845

約数の個数: 40

約数和(自身を含む): 45247104

約数和(自身を除く): 26252624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 5791, 11582, 23164, 28955, 46328, 57910, 92656, 115820, 231640, 237431, 463280, 474862, 949724, 1187155, 1899448, 2374310, 3798896, 4748620, 9497240, 18994480]

約数ペア:

[(1, 18994480), (2, 9497240), (4, 4748620), (5, 3798896), (8, 2374310), (10, 1899448), (16, 1187155), (20, 949724), (40, 474862), (41, 463280), (80, 237431), (82, 231640), (164, 115820), (205, 92656), (328, 57910), (410, 46328), (656, 28955), (820, 23164), (1640, 11582), (3280, 5791)]