21278970

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{1487}}^1$

素因数の和:1556

約数の個数: 64

約数和(自身を含む): 57853440

約数和(自身を除く): 36574470

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 53, 54, 90, 106, 135, 159, 265, 270, 318, 477, 530, 795, 954, 1431, 1487, 1590, 2385, 2862, 2974, 4461, 4770, 7155, 7435, 8922, 13383, 14310, 14870, 22305, 26766, 40149, 44610, 66915, 78811, 80298, 133830, 157622, 200745, 236433, 394055, 401490, 472866, 709299, 788110, 1182165, 1418598, 2127897, 2364330, 3546495, 4255794, 7092990, 10639485, 21278970]

約数ペア:

[(1, 21278970), (2, 10639485), (3, 7092990), (5, 4255794), (6, 3546495), (9, 2364330), (10, 2127897), (15, 1418598), (18, 1182165), (27, 788110), (30, 709299), (45, 472866), (53, 401490), (54, 394055), (90, 236433), (106, 200745), (135, 157622), (159, 133830), (265, 80298), (270, 78811), (318, 66915), (477, 44610), (530, 40149), (795, 26766), (954, 22305), (1431, 14870), (1487, 14310), (1590, 13383), (2385, 8922), (2862, 7435), (2974, 7155), (4461, 4770)]