128600020

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{167}}^1\times {\mathrm{277}}^1$

素因数の和:592

約数の個数: 48

約数和(自身を含む): 274619520

約数和(自身を除く): 146019500

約数列:

[1, 2, 4, 5, 10, 20, 139, 167, 277, 278, 334, 554, 556, 668, 695, 835, 1108, 1385, 1390, 1670, 2770, 2780, 3340, 5540, 23213, 38503, 46259, 46426, 77006, 92518, 92852, 116065, 154012, 185036, 192515, 231295, 232130, 385030, 462590, 464260, 770060, 925180, 6430001, 12860002, 25720004, 32150005, 64300010, 128600020]

約数ペア:

[(1, 128600020), (2, 64300010), (4, 32150005), (5, 25720004), (10, 12860002), (20, 6430001), (139, 925180), (167, 770060), (277, 464260), (278, 462590), (334, 385030), (554, 232130), (556, 231295), (668, 192515), (695, 185036), (835, 154012), (1108, 116065), (1385, 92852), (1390, 92518), (1670, 77006), (2770, 46426), (2780, 46259), (3340, 38503), (5540, 23213)]