20804590640

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{383}}^1\times {\mathrm{16561}}^1$

素因数の和:16998

約数の個数: 80

約数和(自身を含む): 49682820096

約数和(自身を除く): 28878229456

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 383, 410, 656, 766, 820, 1532, 1640, 1915, 3064, 3280, 3830, 6128, 7660, 15320, 15703, 16561, 30640, 31406, 33122, 62812, 66244, 78515, 82805, 125624, 132488, 157030, 165610, 251248, 264976, 314060, 331220, 628120, 662440, 679001, 1256240, 1324880, 1358002, 2716004, 3395005, 5432008, 6342863, 6790010, 10864016, 12685726, 13580020, 25371452, 27160040, 31714315, 50742904, 54320080, 63428630, 101485808, 126857260, 253714520, 260057383, 507429040, 520114766, 1040229532, 1300286915, 2080459064, 2600573830, 4160918128, 5201147660, 10402295320, 20804590640]

約数ペア:

[(1, 20804590640), (2, 10402295320), (4, 5201147660), (5, 4160918128), (8, 2600573830), (10, 2080459064), (16, 1300286915), (20, 1040229532), (40, 520114766), (41, 507429040), (80, 260057383), (82, 253714520), (164, 126857260), (205, 101485808), (328, 63428630), (383, 54320080), (410, 50742904), (656, 31714315), (766, 27160040), (820, 25371452), (1532, 13580020), (1640, 12685726), (1915, 10864016), (3064, 6790010), (3280, 6342863), (3830, 5432008), (6128, 3395005), (7660, 2716004), (15320, 1358002), (15703, 1324880), (16561, 1256240), (30640, 679001), (31406, 662440), (33122, 628120), (62812, 331220), (66244, 314060), (78515, 264976), (82805, 251248), (125624, 165610), (132488, 157030)]