20909438

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2\times {\mathrm{43}}^1$

素因数の和:141

約数の個数: 48

約数和(自身を含む): 37749888

約数和(自身を除く): 16840450

約数列:

[1, 2, 11, 22, 23, 31, 43, 46, 62, 86, 253, 341, 473, 506, 682, 713, 946, 961, 989, 1333, 1426, 1922, 1978, 2666, 7843, 10571, 10879, 14663, 15686, 21142, 21758, 22103, 29326, 30659, 41323, 44206, 61318, 82646, 243133, 337249, 454553, 486266, 674498, 909106, 950429, 1900858, 10454719, 20909438]

約数ペア:

[(1, 20909438), (2, 10454719), (11, 1900858), (22, 950429), (23, 909106), (31, 674498), (43, 486266), (46, 454553), (62, 337249), (86, 243133), (253, 82646), (341, 61318), (473, 44206), (506, 41323), (682, 30659), (713, 29326), (946, 22103), (961, 21758), (989, 21142), (1333, 15686), (1426, 14663), (1922, 10879), (1978, 10571), (2666, 7843)]