81985040

素因数分解:

$2^4\times 5^1\times {\mathrm{131}}^1\times {\mathrm{7823}}^1$

素因数の和:7967

約数の個数: 40

約数和(自身を含む): 192094848

約数和(自身を除く): 110109808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 131, 262, 524, 655, 1048, 1310, 2096, 2620, 5240, 7823, 10480, 15646, 31292, 39115, 62584, 78230, 125168, 156460, 312920, 625840, 1024813, 2049626, 4099252, 5124065, 8198504, 10248130, 16397008, 20496260, 40992520, 81985040]

約数ペア:

[(1, 81985040), (2, 40992520), (4, 20496260), (5, 16397008), (8, 10248130), (10, 8198504), (16, 5124065), (20, 4099252), (40, 2049626), (80, 1024813), (131, 625840), (262, 312920), (524, 156460), (655, 125168), (1048, 78230), (1310, 62584), (2096, 39115), (2620, 31292), (5240, 15646), (7823, 10480)]