81931990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61603}}^1$

素因数の和:61636

約数の個数: 32

約数和(自身を含む): 177419520

約数和(自身を除く): 95487530

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 38, 70, 95, 133, 190, 266, 665, 1330, 61603, 123206, 308015, 431221, 616030, 862442, 1170457, 2156105, 2340914, 4312210, 5852285, 8193199, 11704570, 16386398, 40965995, 81931990]

約数ペア:

[(1, 81931990), (2, 40965995), (5, 16386398), (7, 11704570), (10, 8193199), (14, 5852285), (19, 4312210), (35, 2340914), (38, 2156105), (70, 1170457), (95, 862442), (133, 616030), (190, 431221), (266, 308015), (665, 123206), (1330, 61603)]