20245840

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2609}}^1$

素因数の和:2719

約数の個数: 40

約数和(自身を含む): 47575080

約数和(自身を除く): 27329240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2609, 3880, 5218, 7760, 10436, 13045, 20872, 26090, 41744, 52180, 104360, 208720, 253073, 506146, 1012292, 1265365, 2024584, 2530730, 4049168, 5061460, 10122920, 20245840]

約数ペア:

[(1, 20245840), (2, 10122920), (4, 5061460), (5, 4049168), (8, 2530730), (10, 2024584), (16, 1265365), (20, 1012292), (40, 506146), (80, 253073), (97, 208720), (194, 104360), (388, 52180), (485, 41744), (776, 26090), (970, 20872), (1552, 13045), (1940, 10436), (2609, 7760), (3880, 5218)]