388655575

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{1999}}^1$

素因数の和:2128

約数の個数: 48

約数和(自身を含む): 607104000

約数和(自身を除く): 218448425

約数列:

[1, 5, 7, 11, 25, 35, 55, 77, 101, 175, 275, 385, 505, 707, 1111, 1925, 1999, 2525, 3535, 5555, 7777, 9995, 13993, 17675, 21989, 27775, 38885, 49975, 69965, 109945, 153923, 194425, 201899, 349825, 549725, 769615, 1009495, 1413293, 2220889, 3848075, 5047475, 7066465, 11104445, 15546223, 35332325, 55522225, 77731115, 388655575]

約数ペア:

[(1, 388655575), (5, 77731115), (7, 55522225), (11, 35332325), (25, 15546223), (35, 11104445), (55, 7066465), (77, 5047475), (101, 3848075), (175, 2220889), (275, 1413293), (385, 1009495), (505, 769615), (707, 549725), (1111, 349825), (1925, 201899), (1999, 194425), (2525, 153923), (3535, 109945), (5555, 69965), (7777, 49975), (9995, 38885), (13993, 27775), (17675, 21989)]