20461420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20879}}^1$

素因数の和:20902

約数の個数: 36

約数和(自身を含む): 49986720

約数和(自身を除く): 29525300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20879, 41758, 83516, 104395, 146153, 208790, 292306, 417580, 584612, 730765, 1023071, 1461530, 2046142, 2923060, 4092284, 5115355, 10230710, 20461420]

約数ペア:

[(1, 20461420), (2, 10230710), (4, 5115355), (5, 4092284), (7, 2923060), (10, 2046142), (14, 1461530), (20, 1023071), (28, 730765), (35, 584612), (49, 417580), (70, 292306), (98, 208790), (140, 146153), (196, 104395), (245, 83516), (490, 41758), (980, 20879)]