21103587085

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{136139}}^1$

素因数の和:136297

約数の個数: 32

約数和(自身を含む): 29902878720

約数和(自身を除く): 8799291635

約数列:

[1, 5, 7, 35, 43, 103, 215, 301, 515, 721, 1505, 3605, 4429, 22145, 31003, 136139, 155015, 680695, 952973, 4764865, 5853977, 14022317, 29269885, 40977839, 70111585, 98156219, 204889195, 490781095, 602959631, 3014798155, 4220717417, 21103587085]

約数ペア:

[(1, 21103587085), (5, 4220717417), (7, 3014798155), (35, 602959631), (43, 490781095), (103, 204889195), (215, 98156219), (301, 70111585), (515, 40977839), (721, 29269885), (1505, 14022317), (3605, 5853977), (4429, 4764865), (22145, 952973), (31003, 680695), (136139, 155015)]