398001520

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{101531}}^1$

素因数の和:101558

約数の個数: 60

約数和(自身を含む): 1076442264

約数和(自身を除く): 678440744

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 101531, 203062, 406124, 507655, 710717, 812248, 1015310, 1421434, 1624496, 2030620, 2842868, 3553585, 4061240, 4975019, 5685736, 7107170, 8122480, 9950038, 11371472, 14214340, 19900076, 24875095, 28428680, 39800152, 49750190, 56857360, 79600304, 99500380, 199000760, 398001520]

約数ペア:

[(1, 398001520), (2, 199000760), (4, 99500380), (5, 79600304), (7, 56857360), (8, 49750190), (10, 39800152), (14, 28428680), (16, 24875095), (20, 19900076), (28, 14214340), (35, 11371472), (40, 9950038), (49, 8122480), (56, 7107170), (70, 5685736), (80, 4975019), (98, 4061240), (112, 3553585), (140, 2842868), (196, 2030620), (245, 1624496), (280, 1421434), (392, 1015310), (490, 812248), (560, 710717), (784, 507655), (980, 406124), (1960, 203062), (3920, 101531)]