20499640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10459}}^1$

素因数の和:10484

約数の個数: 48

約数和(自身を含む): 53659800

約数和(自身を除く): 33160160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10459, 20918, 41836, 52295, 73213, 83672, 104590, 146426, 209180, 292852, 366065, 418360, 512491, 585704, 732130, 1024982, 1464260, 2049964, 2562455, 2928520, 4099928, 5124910, 10249820, 20499640]

約数ペア:

[(1, 20499640), (2, 10249820), (4, 5124910), (5, 4099928), (7, 2928520), (8, 2562455), (10, 2049964), (14, 1464260), (20, 1024982), (28, 732130), (35, 585704), (40, 512491), (49, 418360), (56, 366065), (70, 292852), (98, 209180), (140, 146426), (196, 104590), (245, 83672), (280, 73213), (392, 52295), (490, 41836), (980, 20918), (1960, 10459)]