81581440

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6709}}^1$

素因数の和:6747

約数の個数: 64

約数和(自身を含む): 205326000

約数和(自身を除く): 123744560

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 304, 320, 380, 608, 640, 760, 1216, 1520, 2432, 3040, 6080, 6709, 12160, 13418, 26836, 33545, 53672, 67090, 107344, 127471, 134180, 214688, 254942, 268360, 429376, 509884, 536720, 637355, 858752, 1019768, 1073440, 1274710, 2039536, 2146880, 2549420, 4079072, 4293760, 5098840, 8158144, 10197680, 16316288, 20395360, 40790720, 81581440]

約数ペア:

[(1, 81581440), (2, 40790720), (4, 20395360), (5, 16316288), (8, 10197680), (10, 8158144), (16, 5098840), (19, 4293760), (20, 4079072), (32, 2549420), (38, 2146880), (40, 2039536), (64, 1274710), (76, 1073440), (80, 1019768), (95, 858752), (128, 637355), (152, 536720), (160, 509884), (190, 429376), (304, 268360), (320, 254942), (380, 214688), (608, 134180), (640, 127471), (760, 107344), (1216, 67090), (1520, 53672), (2432, 33545), (3040, 26836), (6080, 13418), (6709, 12160)]