20378420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1\times {\mathrm{127}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 44126208

約数和(自身を除く): 23747788

約数列:

[1, 2, 4, 5, 10, 20, 71, 113, 127, 142, 226, 254, 284, 355, 452, 508, 565, 635, 710, 1130, 1270, 1420, 2260, 2540, 8023, 9017, 14351, 16046, 18034, 28702, 32092, 36068, 40115, 45085, 57404, 71755, 80230, 90170, 143510, 160460, 180340, 287020, 1018921, 2037842, 4075684, 5094605, 10189210, 20378420]

約数ペア:

[(1, 20378420), (2, 10189210), (4, 5094605), (5, 4075684), (10, 2037842), (20, 1018921), (71, 287020), (113, 180340), (127, 160460), (142, 143510), (226, 90170), (254, 80230), (284, 71755), (355, 57404), (452, 45085), (508, 40115), (565, 36068), (635, 32092), (710, 28702), (1130, 18034), (1270, 16046), (1420, 14351), (2260, 9017), (2540, 8023)]