21120820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{2557}}^1$

素因数の和:2632

約数の個数: 48

約数和(自身を含む): 51569280

約数和(自身を除く): 30448460

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 59, 70, 118, 140, 236, 295, 413, 590, 826, 1180, 1652, 2065, 2557, 4130, 5114, 8260, 10228, 12785, 17899, 25570, 35798, 51140, 71596, 89495, 150863, 178990, 301726, 357980, 603452, 754315, 1056041, 1508630, 2112082, 3017260, 4224164, 5280205, 10560410, 21120820]

約数ペア:

[(1, 21120820), (2, 10560410), (4, 5280205), (5, 4224164), (7, 3017260), (10, 2112082), (14, 1508630), (20, 1056041), (28, 754315), (35, 603452), (59, 357980), (70, 301726), (118, 178990), (140, 150863), (236, 89495), (295, 71596), (413, 51140), (590, 35798), (826, 25570), (1180, 17899), (1652, 12785), (2065, 10228), (2557, 8260), (4130, 5114)]