204448280

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{7949}}^1$

素因数の和:8603

約数の個数: 32

約数和(自身を含む): 460782000

約数和(自身を除く): 256333720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 1286, 2572, 3215, 5144, 6430, 7949, 12860, 15898, 25720, 31796, 39745, 63592, 79490, 158980, 317960, 5111207, 10222414, 20444828, 25556035, 40889656, 51112070, 102224140, 204448280]

約数ペア:

[(1, 204448280), (2, 102224140), (4, 51112070), (5, 40889656), (8, 25556035), (10, 20444828), (20, 10222414), (40, 5111207), (643, 317960), (1286, 158980), (2572, 79490), (3215, 63592), (5144, 39745), (6430, 31796), (7949, 25720), (12860, 15898)]