20381868

素因数分解:

$2^2\times 3^5\times {\mathrm{13}}^1\times {\mathrm{1613}}^1$

素因数の和:1645

約数の個数: 72

約数和(自身を含む): 57574608

約数和(自身を除く): 37192740

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 27, 36, 39, 52, 54, 78, 81, 108, 117, 156, 162, 234, 243, 324, 351, 468, 486, 702, 972, 1053, 1404, 1613, 2106, 3159, 3226, 4212, 4839, 6318, 6452, 9678, 12636, 14517, 19356, 20969, 29034, 41938, 43551, 58068, 62907, 83876, 87102, 125814, 130653, 174204, 188721, 251628, 261306, 377442, 391959, 522612, 566163, 754884, 783918, 1132326, 1567836, 1698489, 2264652, 3396978, 5095467, 6793956, 10190934, 20381868]

約数ペア:

[(1, 20381868), (2, 10190934), (3, 6793956), (4, 5095467), (6, 3396978), (9, 2264652), (12, 1698489), (13, 1567836), (18, 1132326), (26, 783918), (27, 754884), (36, 566163), (39, 522612), (52, 391959), (54, 377442), (78, 261306), (81, 251628), (108, 188721), (117, 174204), (156, 130653), (162, 125814), (234, 87102), (243, 83876), (324, 62907), (351, 58068), (468, 43551), (486, 41938), (702, 29034), (972, 20969), (1053, 19356), (1404, 14517), (1613, 12636), (2106, 9678), (3159, 6452), (3226, 6318), (4212, 4839)]