20111091

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{181}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 37180416

約数和(自身を除く): 17069325

約数列:

[1, 3, 7, 11, 13, 21, 33, 37, 39, 77, 91, 111, 143, 181, 231, 259, 273, 407, 429, 481, 543, 777, 1001, 1221, 1267, 1443, 1991, 2353, 2849, 3003, 3367, 3801, 5291, 5973, 6697, 7059, 8547, 10101, 13937, 15873, 16471, 20091, 25883, 37037, 41811, 46879, 49413, 73667, 77649, 87061, 111111, 140637, 181181, 221001, 261183, 515669, 543543, 609427, 957671, 1547007, 1828281, 2873013, 6703697, 20111091]

約数ペア:

[(1, 20111091), (3, 6703697), (7, 2873013), (11, 1828281), (13, 1547007), (21, 957671), (33, 609427), (37, 543543), (39, 515669), (77, 261183), (91, 221001), (111, 181181), (143, 140637), (181, 111111), (231, 87061), (259, 77649), (273, 73667), (407, 49413), (429, 46879), (481, 41811), (543, 37037), (777, 25883), (1001, 20091), (1221, 16471), (1267, 15873), (1443, 13937), (1991, 10101), (2353, 8547), (2849, 7059), (3003, 6697), (3367, 5973), (3801, 5291)]