19640720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{2029}}^1$

素因数の和:2064

約数の個数: 60

約数和(自身を含む): 50218140

約数和(自身を除く): 30577420

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 121, 176, 220, 242, 440, 484, 605, 880, 968, 1210, 1936, 2029, 2420, 4058, 4840, 8116, 9680, 10145, 16232, 20290, 22319, 32464, 40580, 44638, 81160, 89276, 111595, 162320, 178552, 223190, 245509, 357104, 446380, 491018, 892760, 982036, 1227545, 1785520, 1964072, 2455090, 3928144, 4910180, 9820360, 19640720]

約数ペア:

[(1, 19640720), (2, 9820360), (4, 4910180), (5, 3928144), (8, 2455090), (10, 1964072), (11, 1785520), (16, 1227545), (20, 982036), (22, 892760), (40, 491018), (44, 446380), (55, 357104), (80, 245509), (88, 223190), (110, 178552), (121, 162320), (176, 111595), (220, 89276), (242, 81160), (440, 44638), (484, 40580), (605, 32464), (880, 22319), (968, 20290), (1210, 16232), (1936, 10145), (2029, 9680), (2420, 8116), (4058, 4840)]