21616760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{673}}^1$

素因数の和:768

約数の個数: 64

約数和(自身を含む): 53866080

約数和(自身を除く): 32249320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 73, 88, 110, 146, 220, 292, 365, 440, 584, 673, 730, 803, 1346, 1460, 1606, 2692, 2920, 3212, 3365, 4015, 5384, 6424, 6730, 7403, 8030, 13460, 14806, 16060, 26920, 29612, 32120, 37015, 49129, 59224, 74030, 98258, 148060, 196516, 245645, 296120, 393032, 491290, 540419, 982580, 1080838, 1965160, 2161676, 2702095, 4323352, 5404190, 10808380, 21616760]

約数ペア:

[(1, 21616760), (2, 10808380), (4, 5404190), (5, 4323352), (8, 2702095), (10, 2161676), (11, 1965160), (20, 1080838), (22, 982580), (40, 540419), (44, 491290), (55, 393032), (73, 296120), (88, 245645), (110, 196516), (146, 148060), (220, 98258), (292, 74030), (365, 59224), (440, 49129), (584, 37015), (673, 32120), (730, 29612), (803, 26920), (1346, 16060), (1460, 14806), (1606, 13460), (2692, 8030), (2920, 7403), (3212, 6730), (3365, 6424), (4015, 5384)]