20185720

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{593}}^1$

素因数の和:664

約数の個数: 64

約数和(自身を含む): 48755520

約数和(自身を除く): 28569800

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 37, 40, 46, 74, 92, 115, 148, 184, 185, 230, 296, 370, 460, 593, 740, 851, 920, 1186, 1480, 1702, 2372, 2965, 3404, 4255, 4744, 5930, 6808, 8510, 11860, 13639, 17020, 21941, 23720, 27278, 34040, 43882, 54556, 68195, 87764, 109112, 109705, 136390, 175528, 219410, 272780, 438820, 504643, 545560, 877640, 1009286, 2018572, 2523215, 4037144, 5046430, 10092860, 20185720]

約数ペア:

[(1, 20185720), (2, 10092860), (4, 5046430), (5, 4037144), (8, 2523215), (10, 2018572), (20, 1009286), (23, 877640), (37, 545560), (40, 504643), (46, 438820), (74, 272780), (92, 219410), (115, 175528), (148, 136390), (184, 109705), (185, 109112), (230, 87764), (296, 68195), (370, 54556), (460, 43882), (593, 34040), (740, 27278), (851, 23720), (920, 21941), (1186, 17020), (1480, 13639), (1702, 11860), (2372, 8510), (2965, 6808), (3404, 5930), (4255, 4744)]