21261968

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{859}}^1$

素因数の和:904

約数の個数: 80

約数和(自身を含む): 53746560

約数和(自身を除く): 32484592

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 17, 26, 28, 34, 52, 56, 68, 91, 104, 112, 119, 136, 182, 208, 221, 238, 272, 364, 442, 476, 728, 859, 884, 952, 1456, 1547, 1718, 1768, 1904, 3094, 3436, 3536, 6013, 6188, 6872, 11167, 12026, 12376, 13744, 14603, 22334, 24052, 24752, 29206, 44668, 48104, 58412, 78169, 89336, 96208, 102221, 116824, 156338, 178672, 189839, 204442, 233648, 312676, 379678, 408884, 625352, 759356, 817768, 1250704, 1328873, 1518712, 1635536, 2657746, 3037424, 5315492, 10630984, 21261968]

約数ペア:

[(1, 21261968), (2, 10630984), (4, 5315492), (7, 3037424), (8, 2657746), (13, 1635536), (14, 1518712), (16, 1328873), (17, 1250704), (26, 817768), (28, 759356), (34, 625352), (52, 408884), (56, 379678), (68, 312676), (91, 233648), (104, 204442), (112, 189839), (119, 178672), (136, 156338), (182, 116824), (208, 102221), (221, 96208), (238, 89336), (272, 78169), (364, 58412), (442, 48104), (476, 44668), (728, 29206), (859, 24752), (884, 24052), (952, 22334), (1456, 14603), (1547, 13744), (1718, 12376), (1768, 12026), (1904, 11167), (3094, 6872), (3436, 6188), (3536, 6013)]