217778820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{518521}}^1$

素因数の和:518540

約数の個数: 48

約数和(自身を含む): 696893568

約数和(自身を除く): 479114748

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 518521, 1037042, 1555563, 2074084, 2592605, 3111126, 3629647, 5185210, 6222252, 7259294, 7777815, 10370420, 10888941, 14518588, 15555630, 18148235, 21777882, 31111260, 36296470, 43555764, 54444705, 72592940, 108889410, 217778820]

約数ペア:

[(1, 217778820), (2, 108889410), (3, 72592940), (4, 54444705), (5, 43555764), (6, 36296470), (7, 31111260), (10, 21777882), (12, 18148235), (14, 15555630), (15, 14518588), (20, 10888941), (21, 10370420), (28, 7777815), (30, 7259294), (35, 6222252), (42, 5185210), (60, 3629647), (70, 3111126), (84, 2592605), (105, 2074084), (140, 1555563), (210, 1037042), (420, 518521)]