645680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{1153}}^1$

素因数の和:1173

約数の個数: 40

約数和(自身を含む): 1717152

約数和(自身を除く): 1071472

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 1153, 2306, 4612, 5765, 8071, 9224, 11530, 16142, 18448, 23060, 32284, 40355, 46120, 64568, 80710, 92240, 129136, 161420, 322840, 645680]

約数ペア:

[(1, 645680), (2, 322840), (4, 161420), (5, 129136), (7, 92240), (8, 80710), (10, 64568), (14, 46120), (16, 40355), (20, 32284), (28, 23060), (35, 18448), (40, 16142), (56, 11530), (70, 9224), (80, 8071), (112, 5765), (140, 4612), (280, 2306), (560, 1153)]