20349440

素因数分解:

$2^9\times 5^1\times {\mathrm{7949}}^1$

素因数の和:7972

約数の個数: 40

約数和(自身を含む): 48797100

約数和(自身を除く): 28447660

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 7949, 15898, 31796, 39745, 63592, 79490, 127184, 158980, 254368, 317960, 508736, 635920, 1017472, 1271840, 2034944, 2543680, 4069888, 5087360, 10174720, 20349440]

約数ペア:

[(1, 20349440), (2, 10174720), (4, 5087360), (5, 4069888), (8, 2543680), (10, 2034944), (16, 1271840), (20, 1017472), (32, 635920), (40, 508736), (64, 317960), (80, 254368), (128, 158980), (160, 127184), (256, 79490), (320, 63592), (512, 39745), (640, 31796), (1280, 15898), (2560, 7949)]