205721720

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{57787}}^1$

素因数の和:57887

約数の個数: 32

約数和(自身を含む): 468082800

約数和(自身を除く): 262361080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 57787, 115574, 231148, 288935, 462296, 577870, 1155740, 2311480, 5143043, 10286086, 20572172, 25715215, 41144344, 51430430, 102860860, 205721720]

約数ペア:

[(1, 205721720), (2, 102860860), (4, 51430430), (5, 41144344), (8, 25715215), (10, 20572172), (20, 10286086), (40, 5143043), (89, 2311480), (178, 1155740), (356, 577870), (445, 462296), (712, 288935), (890, 231148), (1780, 115574), (3560, 57787)]