28894220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{4999}}^1$

素因数の和:5042

約数の個数: 36

約数和(自身を含む): 64470000

約数和(自身を除く): 35575780

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 289, 340, 578, 1156, 1445, 2890, 4999, 5780, 9998, 19996, 24995, 49990, 84983, 99980, 169966, 339932, 424915, 849830, 1444711, 1699660, 2889422, 5778844, 7223555, 14447110, 28894220]

約数ペア:

[(1, 28894220), (2, 14447110), (4, 7223555), (5, 5778844), (10, 2889422), (17, 1699660), (20, 1444711), (34, 849830), (68, 424915), (85, 339932), (170, 169966), (289, 99980), (340, 84983), (578, 49990), (1156, 24995), (1445, 19996), (2890, 9998), (4999, 5780)]