20355020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{347}}^1\times {\mathrm{419}}^1$

素因数の和:782

約数の個数: 48

約数和(自身を含む): 49109760

約数和(自身を除く): 28754740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 347, 419, 694, 838, 1388, 1676, 1735, 2095, 2429, 2933, 3470, 4190, 4858, 5866, 6940, 8380, 9716, 11732, 12145, 14665, 24290, 29330, 48580, 58660, 145393, 290786, 581572, 726965, 1017751, 1453930, 2035502, 2907860, 4071004, 5088755, 10177510, 20355020]

約数ペア:

[(1, 20355020), (2, 10177510), (4, 5088755), (5, 4071004), (7, 2907860), (10, 2035502), (14, 1453930), (20, 1017751), (28, 726965), (35, 581572), (70, 290786), (140, 145393), (347, 58660), (419, 48580), (694, 29330), (838, 24290), (1388, 14665), (1676, 12145), (1735, 11732), (2095, 9716), (2429, 8380), (2933, 6940), (3470, 5866), (4190, 4858)]