21000427938

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{3083}}^1\times {\mathrm{7723}}^1$

素因数の和:10828

約数の個数: 72

約数和(自身を含む): 52953673968

約数和(自身を除く): 31953246030

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 98, 126, 147, 294, 441, 882, 3083, 6166, 7723, 9249, 15446, 18498, 21581, 23169, 27747, 43162, 46338, 54061, 55494, 64743, 69507, 108122, 129486, 139014, 151067, 162183, 194229, 302134, 324366, 378427, 388458, 453201, 486549, 756854, 906402, 973098, 1135281, 1359603, 2270562, 2719206, 3405843, 6811686, 23810009, 47620018, 71430027, 142860054, 166670063, 214290081, 333340126, 428580162, 500010189, 1000020378, 1166690441, 1500030567, 2333380882, 3000061134, 3500071323, 7000142646, 10500213969, 21000427938]

約数ペア:

[(1, 21000427938), (2, 10500213969), (3, 7000142646), (6, 3500071323), (7, 3000061134), (9, 2333380882), (14, 1500030567), (18, 1166690441), (21, 1000020378), (42, 500010189), (49, 428580162), (63, 333340126), (98, 214290081), (126, 166670063), (147, 142860054), (294, 71430027), (441, 47620018), (882, 23810009), (3083, 6811686), (6166, 3405843), (7723, 2719206), (9249, 2270562), (15446, 1359603), (18498, 1135281), (21581, 973098), (23169, 906402), (27747, 756854), (43162, 486549), (46338, 453201), (54061, 388458), (55494, 378427), (64743, 324366), (69507, 302134), (108122, 194229), (129486, 162183), (139014, 151067)]