81742520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{49843}}^1$

素因数の和:49895

約数の個数: 32

約数和(自身を含む): 188410320

約数和(自身を除く): 106667800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 49843, 99686, 199372, 249215, 398744, 498430, 996860, 1993720, 2043563, 4087126, 8174252, 10217815, 16348504, 20435630, 40871260, 81742520]

約数ペア:

[(1, 81742520), (2, 40871260), (4, 20435630), (5, 16348504), (8, 10217815), (10, 8174252), (20, 4087126), (40, 2043563), (41, 1993720), (82, 996860), (164, 498430), (205, 398744), (328, 249215), (410, 199372), (820, 99686), (1640, 49843)]