81215990

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{271}}^1\times {\mathrm{1303}}^1$

素因数の和:1604

約数の個数: 32

約数和(自身を含む): 153225216

約数和(自身を除く): 72009226

約数列:

[1, 2, 5, 10, 23, 46, 115, 230, 271, 542, 1303, 1355, 2606, 2710, 6233, 6515, 12466, 13030, 29969, 31165, 59938, 62330, 149845, 299690, 353113, 706226, 1765565, 3531130, 8121599, 16243198, 40607995, 81215990]

約数ペア:

[(1, 81215990), (2, 40607995), (5, 16243198), (10, 8121599), (23, 3531130), (46, 1765565), (115, 706226), (230, 353113), (271, 299690), (542, 149845), (1303, 62330), (1355, 59938), (2606, 31165), (2710, 29969), (6233, 13030), (6515, 12466)]