21199460

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{251}}^1$

素因数の和:404

約数の個数: 48

約数和(自身を含む): 46230912

約数和(自身を除く): 25031452

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 103, 164, 205, 206, 251, 410, 412, 502, 515, 820, 1004, 1030, 1255, 2060, 2510, 4223, 5020, 8446, 10291, 16892, 20582, 21115, 25853, 41164, 42230, 51455, 51706, 84460, 102910, 103412, 129265, 205820, 258530, 517060, 1059973, 2119946, 4239892, 5299865, 10599730, 21199460]

約数ペア:

[(1, 21199460), (2, 10599730), (4, 5299865), (5, 4239892), (10, 2119946), (20, 1059973), (41, 517060), (82, 258530), (103, 205820), (164, 129265), (205, 103412), (206, 102910), (251, 84460), (410, 51706), (412, 51455), (502, 42230), (515, 41164), (820, 25853), (1004, 21115), (1030, 20582), (1255, 16892), (2060, 10291), (2510, 8446), (4223, 5020)]