21571355

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1$

素因数の和:395

約数の個数: 32

約数和(自身を含む): 29804544

約数和(自身を除く): 8233189

約数列:

[1, 5, 13, 23, 47, 65, 115, 235, 299, 307, 611, 1081, 1495, 1535, 3055, 3991, 5405, 7061, 14053, 14429, 19955, 35305, 70265, 72145, 91793, 187577, 331867, 458965, 937885, 1659335, 4314271, 21571355]

約数ペア:

[(1, 21571355), (5, 4314271), (13, 1659335), (23, 937885), (47, 458965), (65, 331867), (115, 187577), (235, 91793), (299, 72145), (307, 70265), (611, 35305), (1081, 19955), (1495, 14429), (1535, 14053), (3055, 7061), (3991, 5405)]