20178849740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{1009}}^1\times {\mathrm{20407}}^1$

素因数の和:21439

約数の個数: 72

約数和(自身を含む): 49345319520

約数和(自身を除く): 29166469780

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 1009, 2018, 4036, 5045, 7063, 10090, 14126, 20180, 20407, 28252, 35315, 40814, 49441, 70630, 81628, 98882, 102035, 141260, 142849, 197764, 204070, 247205, 285698, 408140, 494410, 571396, 714245, 988820, 999943, 1428490, 1999886, 2856980, 3999772, 4999715, 9999430, 19998860, 20590663, 41181326, 82362652, 102953315, 144134641, 205906630, 288269282, 411813260, 576538564, 720673205, 1008942487, 1441346410, 2017884974, 2882692820, 4035769948, 5044712435, 10089424870, 20178849740]

約数ペア:

[(1, 20178849740), (2, 10089424870), (4, 5044712435), (5, 4035769948), (7, 2882692820), (10, 2017884974), (14, 1441346410), (20, 1008942487), (28, 720673205), (35, 576538564), (49, 411813260), (70, 288269282), (98, 205906630), (140, 144134641), (196, 102953315), (245, 82362652), (490, 41181326), (980, 20590663), (1009, 19998860), (2018, 9999430), (4036, 4999715), (5045, 3999772), (7063, 2856980), (10090, 1999886), (14126, 1428490), (20180, 999943), (20407, 988820), (28252, 714245), (35315, 571396), (40814, 494410), (49441, 408140), (70630, 285698), (81628, 247205), (98882, 204070), (102035, 197764), (141260, 142849)]