21094940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1291}}^1$

素因数の和:1362

約数の個数: 48

約数和(自身を含む): 47752320

約数和(自身を除く): 26657380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 43, 76, 86, 95, 172, 190, 215, 380, 430, 817, 860, 1291, 1634, 2582, 3268, 4085, 5164, 6455, 8170, 12910, 16340, 24529, 25820, 49058, 55513, 98116, 111026, 122645, 222052, 245290, 277565, 490580, 555130, 1054747, 1110260, 2109494, 4218988, 5273735, 10547470, 21094940]

約数ペア:

[(1, 21094940), (2, 10547470), (4, 5273735), (5, 4218988), (10, 2109494), (19, 1110260), (20, 1054747), (38, 555130), (43, 490580), (76, 277565), (86, 245290), (95, 222052), (172, 122645), (190, 111026), (215, 98116), (380, 55513), (430, 49058), (817, 25820), (860, 24529), (1291, 16340), (1634, 12910), (2582, 8170), (3268, 6455), (4085, 5164)]