20399680

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{1301}}^1$

素因数の和:1332

約数の個数: 84

約数和(自身を含む): 56551068

約数和(自身を除く): 36151388

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 320, 392, 448, 490, 560, 784, 980, 1120, 1301, 1568, 1960, 2240, 2602, 3136, 3920, 5204, 6505, 7840, 9107, 10408, 13010, 15680, 18214, 20816, 26020, 36428, 41632, 45535, 52040, 63749, 72856, 83264, 91070, 104080, 127498, 145712, 182140, 208160, 254996, 291424, 318745, 364280, 416320, 509992, 582848, 637490, 728560, 1019984, 1274980, 1457120, 2039968, 2549960, 2914240, 4079936, 5099920, 10199840, 20399680]

約数ペア:

[(1, 20399680), (2, 10199840), (4, 5099920), (5, 4079936), (7, 2914240), (8, 2549960), (10, 2039968), (14, 1457120), (16, 1274980), (20, 1019984), (28, 728560), (32, 637490), (35, 582848), (40, 509992), (49, 416320), (56, 364280), (64, 318745), (70, 291424), (80, 254996), (98, 208160), (112, 182140), (140, 145712), (160, 127498), (196, 104080), (224, 91070), (245, 83264), (280, 72856), (320, 63749), (392, 52040), (448, 45535), (490, 41632), (560, 36428), (784, 26020), (980, 20816), (1120, 18214), (1301, 15680), (1568, 13010), (1960, 10408), (2240, 9107), (2602, 7840), (3136, 6505), (3920, 5204)]