28007920

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{8539}}^1$

素因数の和:8593

約数の個数: 40

約数和(自身を含む): 66714480

約数和(自身を除く): 38706560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 8539, 17078, 34156, 42695, 68312, 85390, 136624, 170780, 341560, 350099, 683120, 700198, 1400396, 1750495, 2800792, 3500990, 5601584, 7001980, 14003960, 28007920]

約数ペア:

[(1, 28007920), (2, 14003960), (4, 7001980), (5, 5601584), (8, 3500990), (10, 2800792), (16, 1750495), (20, 1400396), (40, 700198), (41, 683120), (80, 350099), (82, 341560), (164, 170780), (205, 136624), (328, 85390), (410, 68312), (656, 42695), (820, 34156), (1640, 17078), (3280, 8539)]