20609720

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{163}}^1$

素因数の和:312

約数の個数: 64

約数和(自身を含む): 48708000

約数和(自身を除く): 28098280

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 109, 116, 145, 163, 218, 232, 290, 326, 436, 545, 580, 652, 815, 872, 1090, 1160, 1304, 1630, 2180, 3161, 3260, 4360, 4727, 6322, 6520, 9454, 12644, 15805, 17767, 18908, 23635, 25288, 31610, 35534, 37816, 47270, 63220, 71068, 88835, 94540, 126440, 142136, 177670, 189080, 355340, 515243, 710680, 1030486, 2060972, 2576215, 4121944, 5152430, 10304860, 20609720]

約数ペア:

[(1, 20609720), (2, 10304860), (4, 5152430), (5, 4121944), (8, 2576215), (10, 2060972), (20, 1030486), (29, 710680), (40, 515243), (58, 355340), (109, 189080), (116, 177670), (145, 142136), (163, 126440), (218, 94540), (232, 88835), (290, 71068), (326, 63220), (436, 47270), (545, 37816), (580, 35534), (652, 31610), (815, 25288), (872, 23635), (1090, 18908), (1160, 17767), (1304, 15805), (1630, 12644), (2180, 9454), (3161, 6520), (3260, 6322), (4360, 4727)]