21373485

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:194

約数の個数: 64

約数和(自身を含む): 41140224

約数和(自身を除く): 19766739

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 61, 71, 105, 141, 183, 213, 235, 305, 329, 355, 427, 497, 705, 915, 987, 1065, 1281, 1491, 1645, 2135, 2485, 2867, 3337, 4331, 4935, 6405, 7455, 8601, 10011, 12993, 14335, 16685, 20069, 21655, 23359, 30317, 43005, 50055, 60207, 64965, 70077, 90951, 100345, 116795, 151585, 203557, 301035, 350385, 454755, 610671, 1017785, 1424899, 3053355, 4274697, 7124495, 21373485]

約数ペア:

[(1, 21373485), (3, 7124495), (5, 4274697), (7, 3053355), (15, 1424899), (21, 1017785), (35, 610671), (47, 454755), (61, 350385), (71, 301035), (105, 203557), (141, 151585), (183, 116795), (213, 100345), (235, 90951), (305, 70077), (329, 64965), (355, 60207), (427, 50055), (497, 43005), (705, 30317), (915, 23359), (987, 21655), (1065, 20069), (1281, 16685), (1491, 14335), (1645, 12993), (2135, 10011), (2485, 8601), (2867, 7455), (3337, 6405), (4331, 4935)]