21959505

素因数分解:

$3^4\times 5^1\times {\mathrm{59}}^1\times {\mathrm{919}}^1$

素因数の和:995

約数の個数: 40

約数和(自身を含む): 40075200

約数和(自身を除く): 18115695

約数列:

[1, 3, 5, 9, 15, 27, 45, 59, 81, 135, 177, 295, 405, 531, 885, 919, 1593, 2655, 2757, 4595, 4779, 7965, 8271, 13785, 23895, 24813, 41355, 54221, 74439, 124065, 162663, 271105, 372195, 487989, 813315, 1463967, 2439945, 4391901, 7319835, 21959505]

約数ペア:

[(1, 21959505), (3, 7319835), (5, 4391901), (9, 2439945), (15, 1463967), (27, 813315), (45, 487989), (59, 372195), (81, 271105), (135, 162663), (177, 124065), (295, 74439), (405, 54221), (531, 41355), (885, 24813), (919, 23895), (1593, 13785), (2655, 8271), (2757, 7965), (4595, 4779)]