81798320

素因数分解:

$2^4\times 5^1\times {\mathrm{283}}^1\times {\mathrm{3613}}^1$

素因数の和:3909

約数の個数: 40

約数和(自身を含む): 190905936

約数和(自身を除く): 109107616

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 283, 566, 1132, 1415, 2264, 2830, 3613, 4528, 5660, 7226, 11320, 14452, 18065, 22640, 28904, 36130, 57808, 72260, 144520, 289040, 1022479, 2044958, 4089916, 5112395, 8179832, 10224790, 16359664, 20449580, 40899160, 81798320]

約数ペア:

[(1, 81798320), (2, 40899160), (4, 20449580), (5, 16359664), (8, 10224790), (10, 8179832), (16, 5112395), (20, 4089916), (40, 2044958), (80, 1022479), (283, 289040), (566, 144520), (1132, 72260), (1415, 57808), (2264, 36130), (2830, 28904), (3613, 22640), (4528, 18065), (5660, 14452), (7226, 11320)]