19998880

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1033}}^1$

素因数の和:1070

約数の個数: 72

約数和(自身を含む): 51983316

約数和(自身を除く): 31984436

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 121, 160, 176, 220, 242, 352, 440, 484, 605, 880, 968, 1033, 1210, 1760, 1936, 2066, 2420, 3872, 4132, 4840, 5165, 8264, 9680, 10330, 11363, 16528, 19360, 20660, 22726, 33056, 41320, 45452, 56815, 82640, 90904, 113630, 124993, 165280, 181808, 227260, 249986, 363616, 454520, 499972, 624965, 909040, 999944, 1249930, 1818080, 1999888, 2499860, 3999776, 4999720, 9999440, 19998880]

約数ペア:

[(1, 19998880), (2, 9999440), (4, 4999720), (5, 3999776), (8, 2499860), (10, 1999888), (11, 1818080), (16, 1249930), (20, 999944), (22, 909040), (32, 624965), (40, 499972), (44, 454520), (55, 363616), (80, 249986), (88, 227260), (110, 181808), (121, 165280), (160, 124993), (176, 113630), (220, 90904), (242, 82640), (352, 56815), (440, 45452), (484, 41320), (605, 33056), (880, 22726), (968, 20660), (1033, 19360), (1210, 16528), (1760, 11363), (1936, 10330), (2066, 9680), (2420, 8264), (3872, 5165), (4132, 4840)]