21696675

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2$

素因数の和:78

約数の個数: 144

約数和(自身を含む): 51163392

約数和(自身を除く): 29466717

約数列:

[1, 3, 5, 7, 11, 13, 15, 17, 21, 25, 33, 35, 39, 51, 55, 65, 75, 77, 85, 91, 105, 119, 143, 165, 175, 187, 195, 221, 231, 255, 273, 275, 289, 325, 357, 385, 425, 429, 455, 525, 561, 595, 663, 715, 825, 867, 935, 975, 1001, 1105, 1155, 1275, 1309, 1365, 1445, 1547, 1785, 1925, 2023, 2145, 2275, 2431, 2805, 2975, 3003, 3179, 3315, 3575, 3757, 3927, 4335, 4641, 4675, 5005, 5525, 5775, 6069, 6545, 6825, 7225, 7293, 7735, 8925, 9537, 10115, 10725, 11271, 12155, 14025, 15015, 15895, 16575, 17017, 18785, 19635, 21675, 22253, 23205, 25025, 26299, 30345, 32725, 36465, 38675, 41327, 47685, 50575, 51051, 56355, 60775, 66759, 75075, 78897, 79475, 85085, 93925, 98175, 111265, 116025, 123981, 131495, 151725, 182325, 206635, 238425, 255255, 281775, 289289, 333795, 394485, 425425, 556325, 619905, 657475, 867867, 1033175, 1276275, 1446445, 1668975, 1972425, 3099525, 4339335, 7232225, 21696675]

約数ペア:

[(1, 21696675), (3, 7232225), (5, 4339335), (7, 3099525), (11, 1972425), (13, 1668975), (15, 1446445), (17, 1276275), (21, 1033175), (25, 867867), (33, 657475), (35, 619905), (39, 556325), (51, 425425), (55, 394485), (65, 333795), (75, 289289), (77, 281775), (85, 255255), (91, 238425), (105, 206635), (119, 182325), (143, 151725), (165, 131495), (175, 123981), (187, 116025), (195, 111265), (221, 98175), (231, 93925), (255, 85085), (273, 79475), (275, 78897), (289, 75075), (325, 66759), (357, 60775), (385, 56355), (425, 51051), (429, 50575), (455, 47685), (525, 41327), (561, 38675), (595, 36465), (663, 32725), (715, 30345), (825, 26299), (867, 25025), (935, 23205), (975, 22253), (1001, 21675), (1105, 19635), (1155, 18785), (1275, 17017), (1309, 16575), (1365, 15895), (1445, 15015), (1547, 14025), (1785, 12155), (1925, 11271), (2023, 10725), (2145, 10115), (2275, 9537), (2431, 8925), (2805, 7735), (2975, 7293), (3003, 7225), (3179, 6825), (3315, 6545), (3575, 6069), (3757, 5775), (3927, 5525), (4335, 5005), (4641, 4675)]