81721290

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{389149}}^1$

素因数の和:389166

約数の個数: 32

約数和(自身を含む): 224150400

約数和(自身を除く): 142429110

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 389149, 778298, 1167447, 1945745, 2334894, 2724043, 3891490, 5448086, 5837235, 8172129, 11674470, 13620215, 16344258, 27240430, 40860645, 81721290]

約数ペア:

[(1, 81721290), (2, 40860645), (3, 27240430), (5, 16344258), (6, 13620215), (7, 11674470), (10, 8172129), (14, 5837235), (15, 5448086), (21, 3891490), (30, 2724043), (35, 2334894), (42, 1945745), (70, 1167447), (105, 778298), (210, 389149)]