21909440

素因数分解:

$2^6\times 5^1\times 7^1\times {\mathrm{9781}}^1$

素因数の和:9805

約数の個数: 56

約数和(自身を含む): 59631072

約数和(自身を除く): 37721632

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 140, 160, 224, 280, 320, 448, 560, 1120, 2240, 9781, 19562, 39124, 48905, 68467, 78248, 97810, 136934, 156496, 195620, 273868, 312992, 342335, 391240, 547736, 625984, 684670, 782480, 1095472, 1369340, 1564960, 2190944, 2738680, 3129920, 4381888, 5477360, 10954720, 21909440]

約数ペア:

[(1, 21909440), (2, 10954720), (4, 5477360), (5, 4381888), (7, 3129920), (8, 2738680), (10, 2190944), (14, 1564960), (16, 1369340), (20, 1095472), (28, 782480), (32, 684670), (35, 625984), (40, 547736), (56, 391240), (64, 342335), (70, 312992), (80, 273868), (112, 195620), (140, 156496), (160, 136934), (224, 97810), (280, 78248), (320, 68467), (448, 48905), (560, 39124), (1120, 19562), (2240, 9781)]