21024520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{673}}^1$

素因数の和:766

約数の個数: 64

約数和(自身を含む): 52410240

約数和(自身を除く): 31385720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 71, 88, 110, 142, 220, 284, 355, 440, 568, 673, 710, 781, 1346, 1420, 1562, 2692, 2840, 3124, 3365, 3905, 5384, 6248, 6730, 7403, 7810, 13460, 14806, 15620, 26920, 29612, 31240, 37015, 47783, 59224, 74030, 95566, 148060, 191132, 238915, 296120, 382264, 477830, 525613, 955660, 1051226, 1911320, 2102452, 2628065, 4204904, 5256130, 10512260, 21024520]

約数ペア:

[(1, 21024520), (2, 10512260), (4, 5256130), (5, 4204904), (8, 2628065), (10, 2102452), (11, 1911320), (20, 1051226), (22, 955660), (40, 525613), (44, 477830), (55, 382264), (71, 296120), (88, 238915), (110, 191132), (142, 148060), (220, 95566), (284, 74030), (355, 59224), (440, 47783), (568, 37015), (673, 31240), (710, 29612), (781, 26920), (1346, 15620), (1420, 14806), (1562, 13460), (2692, 7810), (2840, 7403), (3124, 6730), (3365, 6248), (3905, 5384)]