21265132640

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{997}}^1\times {\mathrm{1223}}^1$

素因数の和:2344

約数の個数: 96

約数和(自身を含む): 50792132160

約数和(自身を除く): 29526999520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 997, 1090, 1223, 1744, 1994, 2180, 2446, 3488, 3988, 4360, 4892, 4985, 6115, 7976, 8720, 9784, 9970, 12230, 15952, 17440, 19568, 19940, 24460, 31904, 39136, 39880, 48920, 79760, 97840, 108673, 133307, 159520, 195680, 217346, 266614, 434692, 533228, 543365, 666535, 869384, 1066456, 1086730, 1219331, 1333070, 1738768, 2132912, 2173460, 2438662, 2666140, 3477536, 4265824, 4346920, 4877324, 5332280, 6096655, 8693840, 9754648, 10664560, 12193310, 17387680, 19509296, 21329120, 24386620, 39018592, 48773240, 97546480, 132907079, 195092960, 265814158, 531628316, 664535395, 1063256632, 1329070790, 2126513264, 2658141580, 4253026528, 5316283160, 10632566320, 21265132640]

約数ペア:

[(1, 21265132640), (2, 10632566320), (4, 5316283160), (5, 4253026528), (8, 2658141580), (10, 2126513264), (16, 1329070790), (20, 1063256632), (32, 664535395), (40, 531628316), (80, 265814158), (109, 195092960), (160, 132907079), (218, 97546480), (436, 48773240), (545, 39018592), (872, 24386620), (997, 21329120), (1090, 19509296), (1223, 17387680), (1744, 12193310), (1994, 10664560), (2180, 9754648), (2446, 8693840), (3488, 6096655), (3988, 5332280), (4360, 4877324), (4892, 4346920), (4985, 4265824), (6115, 3477536), (7976, 2666140), (8720, 2438662), (9784, 2173460), (9970, 2132912), (12230, 1738768), (15952, 1333070), (17440, 1219331), (19568, 1086730), (19940, 1066456), (24460, 869384), (31904, 666535), (39136, 543365), (39880, 533228), (48920, 434692), (79760, 266614), (97840, 217346), (108673, 195680), (133307, 159520)]