28217720

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{10529}}^1$

素因数の和:10607

約数の個数: 32

約数和(自身を含む): 64443600

約数和(自身を除く): 36225880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 10529, 21058, 42116, 52645, 84232, 105290, 210580, 421160, 705443, 1410886, 2821772, 3527215, 5643544, 7054430, 14108860, 28217720]

約数ペア:

[(1, 28217720), (2, 14108860), (4, 7054430), (5, 5643544), (8, 3527215), (10, 2821772), (20, 1410886), (40, 705443), (67, 421160), (134, 210580), (268, 105290), (335, 84232), (536, 52645), (670, 42116), (1340, 21058), (2680, 10529)]