20868520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30689}}^1$

素因数の和:30717

約数の個数: 32

約数和(自身を含む): 49717800

約数和(自身を除く): 28849280

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30689, 61378, 122756, 153445, 245512, 306890, 521713, 613780, 1043426, 1227560, 2086852, 2608565, 4173704, 5217130, 10434260, 20868520]

約数ペア:

[(1, 20868520), (2, 10434260), (4, 5217130), (5, 4173704), (8, 2608565), (10, 2086852), (17, 1227560), (20, 1043426), (34, 613780), (40, 521713), (68, 306890), (85, 245512), (136, 153445), (170, 122756), (340, 61378), (680, 30689)]