20787760

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5303}}^1$

素因数の和:5330

約数の個数: 60

約数和(自身を含む): 56233008

約数和(自身を除く): 35445248

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5303, 10606, 21212, 26515, 37121, 42424, 53030, 74242, 84848, 106060, 148484, 185605, 212120, 259847, 296968, 371210, 424240, 519694, 593936, 742420, 1039388, 1299235, 1484840, 2078776, 2598470, 2969680, 4157552, 5196940, 10393880, 20787760]

約数ペア:

[(1, 20787760), (2, 10393880), (4, 5196940), (5, 4157552), (7, 2969680), (8, 2598470), (10, 2078776), (14, 1484840), (16, 1299235), (20, 1039388), (28, 742420), (35, 593936), (40, 519694), (49, 424240), (56, 371210), (70, 296968), (80, 259847), (98, 212120), (112, 185605), (140, 148484), (196, 106060), (245, 84848), (280, 74242), (392, 53030), (490, 42424), (560, 37121), (784, 26515), (980, 21212), (1960, 10606), (3920, 5303)]