20471880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1193}}^1$

素因数の和:1231

約数の個数: 128

約数和(自身を含む): 72213120

約数和(自身を除く): 51741240

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 13, 15, 20, 22, 24, 26, 30, 33, 39, 40, 44, 52, 55, 60, 65, 66, 78, 88, 104, 110, 120, 130, 132, 143, 156, 165, 195, 220, 260, 264, 286, 312, 330, 390, 429, 440, 520, 572, 660, 715, 780, 858, 1144, 1193, 1320, 1430, 1560, 1716, 2145, 2386, 2860, 3432, 3579, 4290, 4772, 5720, 5965, 7158, 8580, 9544, 11930, 13123, 14316, 15509, 17160, 17895, 23860, 26246, 28632, 31018, 35790, 39369, 46527, 47720, 52492, 62036, 65615, 71580, 77545, 78738, 93054, 104984, 124072, 131230, 143160, 155090, 157476, 170599, 186108, 196845, 232635, 262460, 310180, 314952, 341198, 372216, 393690, 465270, 511797, 524920, 620360, 682396, 787380, 852995, 930540, 1023594, 1364792, 1574760, 1705990, 1861080, 2047188, 2558985, 3411980, 4094376, 5117970, 6823960, 10235940, 20471880]

約数ペア:

[(1, 20471880), (2, 10235940), (3, 6823960), (4, 5117970), (5, 4094376), (6, 3411980), (8, 2558985), (10, 2047188), (11, 1861080), (12, 1705990), (13, 1574760), (15, 1364792), (20, 1023594), (22, 930540), (24, 852995), (26, 787380), (30, 682396), (33, 620360), (39, 524920), (40, 511797), (44, 465270), (52, 393690), (55, 372216), (60, 341198), (65, 314952), (66, 310180), (78, 262460), (88, 232635), (104, 196845), (110, 186108), (120, 170599), (130, 157476), (132, 155090), (143, 143160), (156, 131230), (165, 124072), (195, 104984), (220, 93054), (260, 78738), (264, 77545), (286, 71580), (312, 65615), (330, 62036), (390, 52492), (429, 47720), (440, 46527), (520, 39369), (572, 35790), (660, 31018), (715, 28632), (780, 26246), (858, 23860), (1144, 17895), (1193, 17160), (1320, 15509), (1430, 14316), (1560, 13123), (1716, 11930), (2145, 9544), (2386, 8580), (2860, 7158), (3432, 5965), (3579, 5720), (4290, 4772)]