20998404

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{809}}^1$

素因数の和:929

約数の個数: 72

約数和(自身を含む): 61326720

約数和(自身を除く): 40328316

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 103, 126, 206, 252, 309, 412, 618, 721, 809, 927, 1236, 1442, 1618, 1854, 2163, 2427, 2884, 3236, 3708, 4326, 4854, 5663, 6489, 7281, 8652, 9708, 11326, 12978, 14562, 16989, 22652, 25956, 29124, 33978, 50967, 67956, 83327, 101934, 166654, 203868, 249981, 333308, 499962, 583289, 749943, 999924, 1166578, 1499886, 1749867, 2333156, 2999772, 3499734, 5249601, 6999468, 10499202, 20998404]

約数ペア:

[(1, 20998404), (2, 10499202), (3, 6999468), (4, 5249601), (6, 3499734), (7, 2999772), (9, 2333156), (12, 1749867), (14, 1499886), (18, 1166578), (21, 999924), (28, 749943), (36, 583289), (42, 499962), (63, 333308), (84, 249981), (103, 203868), (126, 166654), (206, 101934), (252, 83327), (309, 67956), (412, 50967), (618, 33978), (721, 29124), (809, 25956), (927, 22652), (1236, 16989), (1442, 14562), (1618, 12978), (1854, 11326), (2163, 9708), (2427, 8652), (2884, 7281), (3236, 6489), (3708, 5663), (4326, 4854)]