21071463

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{577}}^1$

素因数の和:671

約数の個数: 32

約数和(自身を含む): 33736704

約数和(自身を除く): 12665241

約数列:

[1, 3, 7, 21, 37, 47, 111, 141, 259, 329, 577, 777, 987, 1731, 1739, 4039, 5217, 12117, 12173, 21349, 27119, 36519, 64047, 81357, 149443, 189833, 448329, 569499, 1003403, 3010209, 7023821, 21071463]

約数ペア:

[(1, 21071463), (3, 7023821), (7, 3010209), (21, 1003403), (37, 569499), (47, 448329), (111, 189833), (141, 149443), (259, 81357), (329, 64047), (577, 36519), (777, 27119), (987, 21349), (1731, 12173), (1739, 12117), (4039, 5217)]