21729420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1979}}^1$

素因数の和:2055

約数の個数: 72

約数和(自身を含む): 67026960

約数和(自身を除く): 45297540

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, 1830, 1979, 2196, 2745, 3660, 3958, 5490, 5937, 7916, 9895, 10980, 11874, 17811, 19790, 23748, 29685, 35622, 39580, 59370, 71244, 89055, 118740, 120719, 178110, 241438, 356220, 362157, 482876, 603595, 724314, 1086471, 1207190, 1448628, 1810785, 2172942, 2414380, 3621570, 4345884, 5432355, 7243140, 10864710, 21729420]

約数ペア:

[(1, 21729420), (2, 10864710), (3, 7243140), (4, 5432355), (5, 4345884), (6, 3621570), (9, 2414380), (10, 2172942), (12, 1810785), (15, 1448628), (18, 1207190), (20, 1086471), (30, 724314), (36, 603595), (45, 482876), (60, 362157), (61, 356220), (90, 241438), (122, 178110), (180, 120719), (183, 118740), (244, 89055), (305, 71244), (366, 59370), (549, 39580), (610, 35622), (732, 29685), (915, 23748), (1098, 19790), (1220, 17811), (1830, 11874), (1979, 10980), (2196, 9895), (2745, 7916), (3660, 5937), (3958, 5490)]