20318145

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:194

約数の個数: 48

約数和(自身を含む): 35661120

約数和(自身を除く): 15342975

約数列:

[1, 3, 5, 15, 17, 43, 51, 85, 109, 129, 215, 255, 289, 327, 545, 645, 731, 867, 1445, 1635, 1853, 2193, 3655, 4335, 4687, 5559, 9265, 10965, 12427, 14061, 23435, 27795, 31501, 37281, 62135, 70305, 79679, 94503, 157505, 186405, 239037, 398395, 472515, 1195185, 1354543, 4063629, 6772715, 20318145]

約数ペア:

[(1, 20318145), (3, 6772715), (5, 4063629), (15, 1354543), (17, 1195185), (43, 472515), (51, 398395), (85, 239037), (109, 186405), (129, 157505), (215, 94503), (255, 79679), (289, 70305), (327, 62135), (545, 37281), (645, 31501), (731, 27795), (867, 23435), (1445, 14061), (1635, 12427), (1853, 10965), (2193, 9265), (3655, 5559), (4335, 4687)]