20994477

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{239}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 33177600

約数和(自身を除く): 12183123

約数列:

[1, 3, 7, 21, 47, 89, 141, 239, 267, 329, 623, 717, 987, 1673, 1869, 4183, 5019, 11233, 12549, 21271, 29281, 33699, 63813, 78631, 87843, 148897, 235893, 446691, 999737, 2999211, 6998159, 20994477]

約数ペア:

[(1, 20994477), (3, 6998159), (7, 2999211), (21, 999737), (47, 446691), (89, 235893), (141, 148897), (239, 87843), (267, 78631), (329, 63813), (623, 33699), (717, 29281), (987, 21271), (1673, 12549), (1869, 11233), (4183, 5019)]