81209660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{173}}^1\times {\mathrm{479}}^1$

素因数の和:675

約数の個数: 72

約数和(自身を含む): 199946880

約数和(自身を除く): 118737220

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 173, 196, 245, 346, 479, 490, 692, 865, 958, 980, 1211, 1730, 1916, 2395, 2422, 3353, 3460, 4790, 4844, 6055, 6706, 8477, 9580, 12110, 13412, 16765, 16954, 23471, 24220, 33530, 33908, 42385, 46942, 67060, 82867, 84770, 93884, 117355, 165734, 169540, 234710, 331468, 414335, 469420, 580069, 828670, 1160138, 1657340, 2320276, 2900345, 4060483, 5800690, 8120966, 11601380, 16241932, 20302415, 40604830, 81209660]

約数ペア:

[(1, 81209660), (2, 40604830), (4, 20302415), (5, 16241932), (7, 11601380), (10, 8120966), (14, 5800690), (20, 4060483), (28, 2900345), (35, 2320276), (49, 1657340), (70, 1160138), (98, 828670), (140, 580069), (173, 469420), (196, 414335), (245, 331468), (346, 234710), (479, 169540), (490, 165734), (692, 117355), (865, 93884), (958, 84770), (980, 82867), (1211, 67060), (1730, 46942), (1916, 42385), (2395, 33908), (2422, 33530), (3353, 24220), (3460, 23471), (4790, 16954), (4844, 16765), (6055, 13412), (6706, 12110), (8477, 9580)]