8191820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{643}}^1$

素因数の和:679

約数の個数: 72

約数和(自身を含む): 21584304

約数和(自身を除く): 13392484

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 643, 910, 980, 1274, 1286, 1820, 2548, 2572, 3185, 3215, 4501, 6370, 6430, 8359, 9002, 12740, 12860, 16718, 18004, 22505, 31507, 33436, 41795, 45010, 58513, 63014, 83590, 90020, 117026, 126028, 157535, 167180, 234052, 292565, 315070, 409591, 585130, 630140, 819182, 1170260, 1638364, 2047955, 4095910, 8191820]

約数ペア:

[(1, 8191820), (2, 4095910), (4, 2047955), (5, 1638364), (7, 1170260), (10, 819182), (13, 630140), (14, 585130), (20, 409591), (26, 315070), (28, 292565), (35, 234052), (49, 167180), (52, 157535), (65, 126028), (70, 117026), (91, 90020), (98, 83590), (130, 63014), (140, 58513), (182, 45010), (196, 41795), (245, 33436), (260, 31507), (364, 22505), (455, 18004), (490, 16718), (637, 12860), (643, 12740), (910, 9002), (980, 8359), (1274, 6430), (1286, 6370), (1820, 4501), (2548, 3215), (2572, 3185)]