28139004

素因数分解:

$2^2\times 3^2\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:291

約数の個数: 72

約数和(自身を含む): 73513440

約数和(自身を除く): 45374436

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 71, 101, 109, 142, 202, 213, 218, 284, 303, 327, 404, 426, 436, 606, 639, 654, 852, 909, 981, 1212, 1278, 1308, 1818, 1962, 2556, 3636, 3924, 7171, 7739, 11009, 14342, 15478, 21513, 22018, 23217, 28684, 30956, 33027, 43026, 44036, 46434, 64539, 66054, 69651, 86052, 92868, 99081, 129078, 132108, 139302, 198162, 258156, 278604, 396324, 781639, 1563278, 2344917, 3126556, 4689834, 7034751, 9379668, 14069502, 28139004]

約数ペア:

[(1, 28139004), (2, 14069502), (3, 9379668), (4, 7034751), (6, 4689834), (9, 3126556), (12, 2344917), (18, 1563278), (36, 781639), (71, 396324), (101, 278604), (109, 258156), (142, 198162), (202, 139302), (213, 132108), (218, 129078), (284, 99081), (303, 92868), (327, 86052), (404, 69651), (426, 66054), (436, 64539), (606, 46434), (639, 44036), (654, 43026), (852, 33027), (909, 30956), (981, 28684), (1212, 23217), (1278, 22018), (1308, 21513), (1818, 15478), (1962, 14342), (2556, 11009), (3636, 7739), (3924, 7171)]