18918540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1723}}^1$

素因数の和:1799

約数の個数: 72

約数和(自身を含む): 58360848

約数和(自身を除く): 39442308

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 61, 90, 122, 180, 183, 244, 305, 366, 549, 610, 732, 915, 1098, 1220, 1723, 1830, 2196, 2745, 3446, 3660, 5169, 5490, 6892, 8615, 10338, 10980, 15507, 17230, 20676, 25845, 31014, 34460, 51690, 62028, 77535, 103380, 105103, 155070, 210206, 310140, 315309, 420412, 525515, 630618, 945927, 1051030, 1261236, 1576545, 1891854, 2102060, 3153090, 3783708, 4729635, 6306180, 9459270, 18918540]

約数ペア:

[(1, 18918540), (2, 9459270), (3, 6306180), (4, 4729635), (5, 3783708), (6, 3153090), (9, 2102060), (10, 1891854), (12, 1576545), (15, 1261236), (18, 1051030), (20, 945927), (30, 630618), (36, 525515), (45, 420412), (60, 315309), (61, 310140), (90, 210206), (122, 155070), (180, 105103), (183, 103380), (244, 77535), (305, 62028), (366, 51690), (549, 34460), (610, 31014), (732, 25845), (915, 20676), (1098, 17230), (1220, 15507), (1723, 10980), (1830, 10338), (2196, 8615), (2745, 6892), (3446, 5490), (3660, 5169)]