18939921

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1$

素因数の和:111

約数の個数: 96

約数和(自身を含む): 37231488

約数和(自身を除く): 18291567

約数列:

[1, 3, 7, 11, 13, 17, 21, 33, 39, 49, 51, 53, 77, 91, 119, 143, 147, 159, 187, 221, 231, 273, 357, 371, 429, 539, 561, 583, 637, 663, 689, 833, 901, 1001, 1113, 1309, 1547, 1617, 1749, 1911, 2067, 2431, 2499, 2597, 2703, 3003, 3927, 4081, 4641, 4823, 6307, 7007, 7293, 7579, 7791, 9163, 9911, 10829, 11713, 12243, 14469, 17017, 18921, 21021, 22737, 27489, 28567, 29733, 32487, 33761, 35139, 44149, 51051, 53053, 69377, 81991, 85701, 101283, 119119, 128843, 132447, 159159, 208131, 245973, 357357, 371371, 386529, 485639, 573937, 901901, 1114113, 1456917, 1721811, 2705703, 6313307, 18939921]

約数ペア:

[(1, 18939921), (3, 6313307), (7, 2705703), (11, 1721811), (13, 1456917), (17, 1114113), (21, 901901), (33, 573937), (39, 485639), (49, 386529), (51, 371371), (53, 357357), (77, 245973), (91, 208131), (119, 159159), (143, 132447), (147, 128843), (159, 119119), (187, 101283), (221, 85701), (231, 81991), (273, 69377), (357, 53053), (371, 51051), (429, 44149), (539, 35139), (561, 33761), (583, 32487), (637, 29733), (663, 28567), (689, 27489), (833, 22737), (901, 21021), (1001, 18921), (1113, 17017), (1309, 14469), (1547, 12243), (1617, 11713), (1749, 10829), (1911, 9911), (2067, 9163), (2431, 7791), (2499, 7579), (2597, 7293), (2703, 7007), (3003, 6307), (3927, 4823), (4081, 4641)]