20781567382040

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{2087}}^1\times {\mathrm{14643569}}^1$

素因数の和:14645684

約数の個数: 64

約数和(自身を含む): 49532754139200

約数和(自身を除く): 28751186757160

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 2087, 4174, 8348, 10435, 16696, 20870, 35479, 41740, 70958, 83480, 141916, 177395, 283832, 354790, 709580, 1419160, 14643569, 29287138, 58574276, 73217845, 117148552, 146435690, 248940673, 292871380, 497881346, 585742760, 995762692, 1244703365, 1991525384, 2489406730, 4978813460, 9957626920, 30561128503, 61122257006, 122244514012, 152805642515, 244489028024, 305611285030, 519539184551, 611222570060, 1039078369102, 1222445140120, 2078156738204, 2597695922755, 4156313476408, 5195391845510, 10390783691020, 20781567382040]

約数ペア:

[(1, 20781567382040), (2, 10390783691020), (4, 5195391845510), (5, 4156313476408), (8, 2597695922755), (10, 2078156738204), (17, 1222445140120), (20, 1039078369102), (34, 611222570060), (40, 519539184551), (68, 305611285030), (85, 244489028024), (136, 152805642515), (170, 122244514012), (340, 61122257006), (680, 30561128503), (2087, 9957626920), (4174, 4978813460), (8348, 2489406730), (10435, 1991525384), (16696, 1244703365), (20870, 995762692), (35479, 585742760), (41740, 497881346), (70958, 292871380), (83480, 248940673), (141916, 146435690), (177395, 117148552), (283832, 73217845), (354790, 58574276), (709580, 29287138), (1419160, 14643569)]