81886240

素因数分解:

$2^5\times 5^1\times {\mathrm{251}}^1\times {\mathrm{2039}}^1$

素因数の和:2305

約数の個数: 48

約数和(自身を含む): 194322240

約数和(自身を除く): 112436000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 251, 502, 1004, 1255, 2008, 2039, 2510, 4016, 4078, 5020, 8032, 8156, 10040, 10195, 16312, 20080, 20390, 32624, 40160, 40780, 65248, 81560, 163120, 326240, 511789, 1023578, 2047156, 2558945, 4094312, 5117890, 8188624, 10235780, 16377248, 20471560, 40943120, 81886240]

約数ペア:

[(1, 81886240), (2, 40943120), (4, 20471560), (5, 16377248), (8, 10235780), (10, 8188624), (16, 5117890), (20, 4094312), (32, 2558945), (40, 2047156), (80, 1023578), (160, 511789), (251, 326240), (502, 163120), (1004, 81560), (1255, 65248), (2008, 40780), (2039, 40160), (2510, 32624), (4016, 20390), (4078, 20080), (5020, 16312), (8032, 10195), (8156, 10040)]