20999930

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{2521}}^1$

素因数の和:2559

約数の個数: 48

約数和(自身を含む): 46576296

約数和(自身を除く): 25576366

約数列:

[1, 2, 5, 7, 10, 14, 17, 34, 35, 49, 70, 85, 98, 119, 170, 238, 245, 490, 595, 833, 1190, 1666, 2521, 4165, 5042, 8330, 12605, 17647, 25210, 35294, 42857, 85714, 88235, 123529, 176470, 214285, 247058, 299999, 428570, 599998, 617645, 1235290, 1499995, 2099993, 2999990, 4199986, 10499965, 20999930]

約数ペア:

[(1, 20999930), (2, 10499965), (5, 4199986), (7, 2999990), (10, 2099993), (14, 1499995), (17, 1235290), (34, 617645), (35, 599998), (49, 428570), (70, 299999), (85, 247058), (98, 214285), (119, 176470), (170, 123529), (238, 88235), (245, 85714), (490, 42857), (595, 35294), (833, 25210), (1190, 17647), (1666, 12605), (2521, 8330), (4165, 5042)]