21209510

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{431}}^1$

素因数の和:501

約数の個数: 64

約数和(自身を含む): 47278080

約数和(自身を除く): 26068570

約数列:

[1, 2, 5, 7, 10, 14, 19, 35, 37, 38, 70, 74, 95, 133, 185, 190, 259, 266, 370, 431, 518, 665, 703, 862, 1295, 1330, 1406, 2155, 2590, 3017, 3515, 4310, 4921, 6034, 7030, 8189, 9842, 15085, 15947, 16378, 24605, 30170, 31894, 40945, 49210, 57323, 79735, 81890, 111629, 114646, 159470, 223258, 286615, 302993, 558145, 573230, 605986, 1116290, 1514965, 2120951, 3029930, 4241902, 10604755, 21209510]

約数ペア:

[(1, 21209510), (2, 10604755), (5, 4241902), (7, 3029930), (10, 2120951), (14, 1514965), (19, 1116290), (35, 605986), (37, 573230), (38, 558145), (70, 302993), (74, 286615), (95, 223258), (133, 159470), (185, 114646), (190, 111629), (259, 81890), (266, 79735), (370, 57323), (431, 49210), (518, 40945), (665, 31894), (703, 30170), (862, 24605), (1295, 16378), (1330, 15947), (1406, 15085), (2155, 9842), (2590, 8189), (3017, 7030), (3515, 6034), (4310, 4921)]