640982720

素因数分解:

$2^6\times 5^1\times 7^2\times {\mathrm{40879}}^1$

素因数の和:40910

約数の個数: 84

約数和(自身を含む): 1775581920

約数和(自身を除く): 1134599200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 64, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 320, 392, 448, 490, 560, 784, 980, 1120, 1568, 1960, 2240, 3136, 3920, 7840, 15680, 40879, 81758, 163516, 204395, 286153, 327032, 408790, 572306, 654064, 817580, 1144612, 1308128, 1430765, 1635160, 2003071, 2289224, 2616256, 2861530, 3270320, 4006142, 4578448, 5723060, 6540640, 8012284, 9156896, 10015355, 11446120, 13081280, 16024568, 18313792, 20030710, 22892240, 32049136, 40061420, 45784480, 64098272, 80122840, 91568960, 128196544, 160245680, 320491360, 640982720]

約数ペア:

[(1, 640982720), (2, 320491360), (4, 160245680), (5, 128196544), (7, 91568960), (8, 80122840), (10, 64098272), (14, 45784480), (16, 40061420), (20, 32049136), (28, 22892240), (32, 20030710), (35, 18313792), (40, 16024568), (49, 13081280), (56, 11446120), (64, 10015355), (70, 9156896), (80, 8012284), (98, 6540640), (112, 5723060), (140, 4578448), (160, 4006142), (196, 3270320), (224, 2861530), (245, 2616256), (280, 2289224), (320, 2003071), (392, 1635160), (448, 1430765), (490, 1308128), (560, 1144612), (784, 817580), (980, 654064), (1120, 572306), (1568, 408790), (1960, 327032), (2240, 286153), (3136, 204395), (3920, 163516), (7840, 81758), (15680, 40879)]