179949980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{643}}^1\times {\mathrm{1999}}^1$

素因数の和:2658

約数の個数: 48

約数和(自身を含む): 432768000

約数和(自身を除く): 252818020

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 643, 1286, 1999, 2572, 3215, 3998, 4501, 6430, 7996, 9002, 9995, 12860, 13993, 18004, 19990, 22505, 27986, 39980, 45010, 55972, 69965, 90020, 139930, 279860, 1285357, 2570714, 5141428, 6426785, 8997499, 12853570, 17994998, 25707140, 35989996, 44987495, 89974990, 179949980]

約数ペア:

[(1, 179949980), (2, 89974990), (4, 44987495), (5, 35989996), (7, 25707140), (10, 17994998), (14, 12853570), (20, 8997499), (28, 6426785), (35, 5141428), (70, 2570714), (140, 1285357), (643, 279860), (1286, 139930), (1999, 90020), (2572, 69965), (3215, 55972), (3998, 45010), (4501, 39980), (6430, 27986), (7996, 22505), (9002, 19990), (9995, 18004), (12860, 13993)]