20404917

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{137}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 34157760

約数和(自身を除く): 13752843

約数列:

[1, 3, 9, 13, 19, 39, 57, 67, 117, 137, 171, 201, 247, 411, 603, 741, 871, 1233, 1273, 1781, 2223, 2603, 2613, 3819, 5343, 7809, 7839, 9179, 11457, 16029, 16549, 23427, 27537, 33839, 49647, 82611, 101517, 119327, 148941, 174401, 304551, 357981, 523203, 1073943, 1569609, 2267213, 6801639, 20404917]

約数ペア:

[(1, 20404917), (3, 6801639), (9, 2267213), (13, 1569609), (19, 1073943), (39, 523203), (57, 357981), (67, 304551), (117, 174401), (137, 148941), (171, 119327), (201, 101517), (247, 82611), (411, 49647), (603, 33839), (741, 27537), (871, 23427), (1233, 16549), (1273, 16029), (1781, 11457), (2223, 9179), (2603, 7839), (2613, 7809), (3819, 5343)]