21013545

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{103}}^1$

素因数の和:214

約数の個数: 64

約数和(自身を含む): 40734720

約数和(自身を除く): 19721175

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 67, 87, 103, 105, 145, 201, 203, 309, 335, 435, 469, 515, 609, 721, 1005, 1015, 1407, 1545, 1943, 2163, 2345, 2987, 3045, 3605, 5829, 6901, 7035, 8961, 9715, 10815, 13601, 14935, 20703, 20909, 29145, 34505, 40803, 44805, 48307, 62727, 68005, 103515, 104545, 144921, 200129, 204015, 241535, 313635, 600387, 724605, 1000645, 1400903, 3001935, 4202709, 7004515, 21013545]

約数ペア:

[(1, 21013545), (3, 7004515), (5, 4202709), (7, 3001935), (15, 1400903), (21, 1000645), (29, 724605), (35, 600387), (67, 313635), (87, 241535), (103, 204015), (105, 200129), (145, 144921), (201, 104545), (203, 103515), (309, 68005), (335, 62727), (435, 48307), (469, 44805), (515, 40803), (609, 34505), (721, 29145), (1005, 20909), (1015, 20703), (1407, 14935), (1545, 13601), (1943, 10815), (2163, 9715), (2345, 8961), (2987, 7035), (3045, 6901), (3605, 5829)]