19800440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4091}}^1$

素因数の和:4124

約数の個数: 48

約数和(自身を含む): 48981240

約数和(自身を除く): 29180800

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4091, 4840, 8182, 16364, 20455, 32728, 40910, 45001, 81820, 90002, 163640, 180004, 225005, 360008, 450010, 495011, 900020, 990022, 1800040, 1980044, 2475055, 3960088, 4950110, 9900220, 19800440]

約数ペア:

[(1, 19800440), (2, 9900220), (4, 4950110), (5, 3960088), (8, 2475055), (10, 1980044), (11, 1800040), (20, 990022), (22, 900020), (40, 495011), (44, 450010), (55, 360008), (88, 225005), (110, 180004), (121, 163640), (220, 90002), (242, 81820), (440, 45001), (484, 40910), (605, 32728), (968, 20455), (1210, 16364), (2420, 8182), (4091, 4840)]