81780568

素因数分解:

$2^3\times {\mathrm{41}}^1\times {\mathrm{167}}^1\times {\mathrm{1493}}^1$

素因数の和:1707

約数の個数: 32

約数和(自身を含む): 158124960

約数和(自身を除く): 76344392

約数列:

[1, 2, 4, 8, 41, 82, 164, 167, 328, 334, 668, 1336, 1493, 2986, 5972, 6847, 11944, 13694, 27388, 54776, 61213, 122426, 244852, 249331, 489704, 498662, 997324, 1994648, 10222571, 20445142, 40890284, 81780568]

約数ペア:

[(1, 81780568), (2, 40890284), (4, 20445142), (8, 10222571), (41, 1994648), (82, 997324), (164, 498662), (167, 489704), (328, 249331), (334, 244852), (668, 122426), (1336, 61213), (1493, 54776), (2986, 27388), (5972, 13694), (6847, 11944)]