858489980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{199}}^1\times {\mathrm{5261}}^1$

素因数の和:5510

約数の個数: 48

約数和(自身を含む): 1856433600

約数和(自身を除く): 997943620

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 199, 205, 398, 410, 796, 820, 995, 1990, 3980, 5261, 8159, 10522, 16318, 21044, 26305, 32636, 40795, 52610, 81590, 105220, 163180, 215701, 431402, 862804, 1046939, 1078505, 2093878, 2157010, 4187756, 4314020, 5234695, 10469390, 20938780, 42924499, 85848998, 171697996, 214622495, 429244990, 858489980]

約数ペア:

[(1, 858489980), (2, 429244990), (4, 214622495), (5, 171697996), (10, 85848998), (20, 42924499), (41, 20938780), (82, 10469390), (164, 5234695), (199, 4314020), (205, 4187756), (398, 2157010), (410, 2093878), (796, 1078505), (820, 1046939), (995, 862804), (1990, 431402), (3980, 215701), (5261, 163180), (8159, 105220), (10522, 81590), (16318, 52610), (21044, 40795), (26305, 32636)]