20480560

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3821}}^1$

素因数の和:3901

約数の個数: 40

約数和(自身を含む): 48340656

約数和(自身を除く): 27860096

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3821, 5360, 7642, 15284, 19105, 30568, 38210, 61136, 76420, 152840, 256007, 305680, 512014, 1024028, 1280035, 2048056, 2560070, 4096112, 5120140, 10240280, 20480560]

約数ペア:

[(1, 20480560), (2, 10240280), (4, 5120140), (5, 4096112), (8, 2560070), (10, 2048056), (16, 1280035), (20, 1024028), (40, 512014), (67, 305680), (80, 256007), (134, 152840), (268, 76420), (335, 61136), (536, 38210), (670, 30568), (1072, 19105), (1340, 15284), (2680, 7642), (3821, 5360)]