20981592

素因数分解:

$2^3\times 3^5\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:315

約数の個数: 96

約数和(自身を含む): 60540480

約数和(自身を除く): 39558888

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 43, 54, 72, 81, 86, 108, 129, 162, 172, 216, 243, 251, 258, 324, 344, 387, 486, 502, 516, 648, 753, 774, 972, 1004, 1032, 1161, 1506, 1548, 1944, 2008, 2259, 2322, 3012, 3096, 3483, 4518, 4644, 6024, 6777, 6966, 9036, 9288, 10449, 10793, 13554, 13932, 18072, 20331, 20898, 21586, 27108, 27864, 32379, 40662, 41796, 43172, 54216, 60993, 64758, 81324, 83592, 86344, 97137, 121986, 129516, 162648, 194274, 243972, 259032, 291411, 388548, 487944, 582822, 777096, 874233, 1165644, 1748466, 2331288, 2622699, 3496932, 5245398, 6993864, 10490796, 20981592]

約数ペア:

[(1, 20981592), (2, 10490796), (3, 6993864), (4, 5245398), (6, 3496932), (8, 2622699), (9, 2331288), (12, 1748466), (18, 1165644), (24, 874233), (27, 777096), (36, 582822), (43, 487944), (54, 388548), (72, 291411), (81, 259032), (86, 243972), (108, 194274), (129, 162648), (162, 129516), (172, 121986), (216, 97137), (243, 86344), (251, 83592), (258, 81324), (324, 64758), (344, 60993), (387, 54216), (486, 43172), (502, 41796), (516, 40662), (648, 32379), (753, 27864), (774, 27108), (972, 21586), (1004, 20898), (1032, 20331), (1161, 18072), (1506, 13932), (1548, 13554), (1944, 10793), (2008, 10449), (2259, 9288), (2322, 9036), (3012, 6966), (3096, 6777), (3483, 6024), (4518, 4644)]