21317440

素因数分解:

$2^6\times 5^1\times {\mathrm{66617}}^1$

素因数の和:66634

約数の個数: 28

約数和(自身を含む): 50762916

約数和(自身を除く): 29445476

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 66617, 133234, 266468, 333085, 532936, 666170, 1065872, 1332340, 2131744, 2664680, 4263488, 5329360, 10658720, 21317440]

約数ペア:

[(1, 21317440), (2, 10658720), (4, 5329360), (5, 4263488), (8, 2664680), (10, 2131744), (16, 1332340), (20, 1065872), (32, 666170), (40, 532936), (64, 333085), (80, 266468), (160, 133234), (320, 66617)]