201880720

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{1009}}^1$

素因数の和:1124

約数の個数: 80

約数和(自身を含む): 489187440

約数和(自身を除く): 287306720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 61, 80, 82, 122, 164, 205, 244, 305, 328, 410, 488, 610, 656, 820, 976, 1009, 1220, 1640, 2018, 2440, 2501, 3280, 4036, 4880, 5002, 5045, 8072, 10004, 10090, 12505, 16144, 20008, 20180, 25010, 40016, 40360, 41369, 50020, 61549, 80720, 82738, 100040, 123098, 165476, 200080, 206845, 246196, 307745, 330952, 413690, 492392, 615490, 661904, 827380, 984784, 1230980, 1654760, 2461960, 2523509, 3309520, 4923920, 5047018, 10094036, 12617545, 20188072, 25235090, 40376144, 50470180, 100940360, 201880720]

約数ペア:

[(1, 201880720), (2, 100940360), (4, 50470180), (5, 40376144), (8, 25235090), (10, 20188072), (16, 12617545), (20, 10094036), (40, 5047018), (41, 4923920), (61, 3309520), (80, 2523509), (82, 2461960), (122, 1654760), (164, 1230980), (205, 984784), (244, 827380), (305, 661904), (328, 615490), (410, 492392), (488, 413690), (610, 330952), (656, 307745), (820, 246196), (976, 206845), (1009, 200080), (1220, 165476), (1640, 123098), (2018, 100040), (2440, 82738), (2501, 80720), (3280, 61549), (4036, 50020), (4880, 41369), (5002, 40360), (5045, 40016), (8072, 25010), (10004, 20180), (10090, 20008), (12505, 16144)]