81222320

素因数分解:

$2^4\times 5^1\times {\mathrm{631}}^1\times {\mathrm{1609}}^1$

素因数の和:2253

約数の個数: 40

約数和(自身を含む): 189258720

約数和(自身を除く): 108036400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 631, 1262, 1609, 2524, 3155, 3218, 5048, 6310, 6436, 8045, 10096, 12620, 12872, 16090, 25240, 25744, 32180, 50480, 64360, 128720, 1015279, 2030558, 4061116, 5076395, 8122232, 10152790, 16244464, 20305580, 40611160, 81222320]

約数ペア:

[(1, 81222320), (2, 40611160), (4, 20305580), (5, 16244464), (8, 10152790), (10, 8122232), (16, 5076395), (20, 4061116), (40, 2030558), (80, 1015279), (631, 128720), (1262, 64360), (1609, 50480), (2524, 32180), (3155, 25744), (3218, 25240), (5048, 16090), (6310, 12872), (6436, 12620), (8045, 10096)]