21250215

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{199}}^1$

素因数の和:333

約数の個数: 64

約数和(自身を含む): 43776000

約数和(自身を除く): 22525785

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 113, 135, 189, 199, 315, 339, 565, 597, 791, 945, 995, 1017, 1393, 1695, 1791, 2373, 2985, 3051, 3955, 4179, 5085, 5373, 6965, 7119, 8955, 11865, 12537, 15255, 20895, 21357, 22487, 26865, 35595, 37611, 62685, 67461, 106785, 112435, 157409, 188055, 202383, 337305, 472227, 607149, 787045, 1011915, 1416681, 2361135, 3035745, 4250043, 7083405, 21250215]

約数ペア:

[(1, 21250215), (3, 7083405), (5, 4250043), (7, 3035745), (9, 2361135), (15, 1416681), (21, 1011915), (27, 787045), (35, 607149), (45, 472227), (63, 337305), (105, 202383), (113, 188055), (135, 157409), (189, 112435), (199, 106785), (315, 67461), (339, 62685), (565, 37611), (597, 35595), (791, 26865), (945, 22487), (995, 21357), (1017, 20895), (1393, 15255), (1695, 12537), (1791, 11865), (2373, 8955), (2985, 7119), (3051, 6965), (3955, 5373), (4179, 5085)]