20538639

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{179}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 34819200

約数和(自身を除く): 14280561

約数列:

[1, 3, 9, 11, 19, 33, 57, 61, 99, 171, 179, 183, 209, 537, 549, 627, 671, 1159, 1611, 1881, 1969, 2013, 3401, 3477, 5907, 6039, 10203, 10431, 10919, 12749, 17721, 30609, 32757, 37411, 38247, 98271, 112233, 114741, 120109, 207461, 336699, 360327, 622383, 1080981, 1867149, 2282071, 6846213, 20538639]

約数ペア:

[(1, 20538639), (3, 6846213), (9, 2282071), (11, 1867149), (19, 1080981), (33, 622383), (57, 360327), (61, 336699), (99, 207461), (171, 120109), (179, 114741), (183, 112233), (209, 98271), (537, 38247), (549, 37411), (627, 32757), (671, 30609), (1159, 17721), (1611, 12749), (1881, 10919), (1969, 10431), (2013, 10203), (3401, 6039), (3477, 5907)]