81913560

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{971}}^1$

素因数の和:1041

約数の個数: 128

約数和(自身を含む): 265939200

約数和(自身を除く): 184025640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 37, 38, 40, 57, 60, 74, 76, 95, 111, 114, 120, 148, 152, 185, 190, 222, 228, 285, 296, 370, 380, 444, 456, 555, 570, 703, 740, 760, 888, 971, 1110, 1140, 1406, 1480, 1942, 2109, 2220, 2280, 2812, 2913, 3515, 3884, 4218, 4440, 4855, 5624, 5826, 7030, 7768, 8436, 9710, 10545, 11652, 14060, 14565, 16872, 18449, 19420, 21090, 23304, 28120, 29130, 35927, 36898, 38840, 42180, 55347, 58260, 71854, 73796, 84360, 92245, 107781, 110694, 116520, 143708, 147592, 179635, 184490, 215562, 221388, 276735, 287416, 359270, 368980, 431124, 442776, 538905, 553470, 682613, 718540, 737960, 862248, 1077810, 1106940, 1365226, 1437080, 2047839, 2155620, 2213880, 2730452, 3413065, 4095678, 4311240, 5460904, 6826130, 8191356, 10239195, 13652260, 16382712, 20478390, 27304520, 40956780, 81913560]

約数ペア:

[(1, 81913560), (2, 40956780), (3, 27304520), (4, 20478390), (5, 16382712), (6, 13652260), (8, 10239195), (10, 8191356), (12, 6826130), (15, 5460904), (19, 4311240), (20, 4095678), (24, 3413065), (30, 2730452), (37, 2213880), (38, 2155620), (40, 2047839), (57, 1437080), (60, 1365226), (74, 1106940), (76, 1077810), (95, 862248), (111, 737960), (114, 718540), (120, 682613), (148, 553470), (152, 538905), (185, 442776), (190, 431124), (222, 368980), (228, 359270), (285, 287416), (296, 276735), (370, 221388), (380, 215562), (444, 184490), (456, 179635), (555, 147592), (570, 143708), (703, 116520), (740, 110694), (760, 107781), (888, 92245), (971, 84360), (1110, 73796), (1140, 71854), (1406, 58260), (1480, 55347), (1942, 42180), (2109, 38840), (2220, 36898), (2280, 35927), (2812, 29130), (2913, 28120), (3515, 23304), (3884, 21090), (4218, 19420), (4440, 18449), (4855, 16872), (5624, 14565), (5826, 14060), (7030, 11652), (7768, 10545), (8436, 9710)]