20998878

素因数分解:

$2^1\times 3^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1\times {\mathrm{409}}^1$

素因数の和:656

約数の個数: 32

約数和(自身を含む): 43296000

約数和(自身を除く): 22297122

約数列:

[1, 2, 3, 6, 43, 86, 129, 199, 258, 398, 409, 597, 818, 1194, 1227, 2454, 8557, 17114, 17587, 25671, 35174, 51342, 52761, 81391, 105522, 162782, 244173, 488346, 3499813, 6999626, 10499439, 20998878]

約数ペア:

[(1, 20998878), (2, 10499439), (3, 6999626), (6, 3499813), (43, 488346), (86, 244173), (129, 162782), (199, 105522), (258, 81391), (398, 52761), (409, 51342), (597, 35174), (818, 25671), (1194, 17587), (1227, 17114), (2454, 8557)]