21648420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{127}}^1\times {\mathrm{947}}^1$

素因数の和:1089

約数の個数: 72

約数和(自身を含む): 66253824

約数和(自身を除く): 44605404

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 127, 180, 254, 381, 508, 635, 762, 947, 1143, 1270, 1524, 1894, 1905, 2286, 2540, 2841, 3788, 3810, 4572, 4735, 5682, 5715, 7620, 8523, 9470, 11364, 11430, 14205, 17046, 18940, 22860, 28410, 34092, 42615, 56820, 85230, 120269, 170460, 240538, 360807, 481076, 601345, 721614, 1082421, 1202690, 1443228, 1804035, 2164842, 2405380, 3608070, 4329684, 5412105, 7216140, 10824210, 21648420]

約数ペア:

[(1, 21648420), (2, 10824210), (3, 7216140), (4, 5412105), (5, 4329684), (6, 3608070), (9, 2405380), (10, 2164842), (12, 1804035), (15, 1443228), (18, 1202690), (20, 1082421), (30, 721614), (36, 601345), (45, 481076), (60, 360807), (90, 240538), (127, 170460), (180, 120269), (254, 85230), (381, 56820), (508, 42615), (635, 34092), (762, 28410), (947, 22860), (1143, 18940), (1270, 17046), (1524, 14205), (1894, 11430), (1905, 11364), (2286, 9470), (2540, 8523), (2841, 7620), (3788, 5715), (3810, 5682), (4572, 4735)]