21781480

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11113}}^1$

素因数の和:11138

約数の個数: 48

約数和(自身を含む): 57014820

約数和(自身を除く): 35233340

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 11113, 22226, 44452, 55565, 77791, 88904, 111130, 155582, 222260, 311164, 388955, 444520, 544537, 622328, 777910, 1089074, 1555820, 2178148, 2722685, 3111640, 4356296, 5445370, 10890740, 21781480]

約数ペア:

[(1, 21781480), (2, 10890740), (4, 5445370), (5, 4356296), (7, 3111640), (8, 2722685), (10, 2178148), (14, 1555820), (20, 1089074), (28, 777910), (35, 622328), (40, 544537), (49, 444520), (56, 388955), (70, 311164), (98, 222260), (140, 155582), (196, 111130), (245, 88904), (280, 77791), (392, 55565), (490, 44452), (980, 22226), (1960, 11113)]