81820840

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{541}}^1$

素因数の和:770

約数の個数: 64

約数和(自身を含む): 195120000

約数和(自身を除く): 113299160

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 199, 380, 398, 541, 760, 796, 995, 1082, 1592, 1990, 2164, 2705, 3781, 3980, 4328, 5410, 7562, 7960, 10279, 10820, 15124, 18905, 20558, 21640, 30248, 37810, 41116, 51395, 75620, 82232, 102790, 107659, 151240, 205580, 215318, 411160, 430636, 538295, 861272, 1076590, 2045521, 2153180, 4091042, 4306360, 8182084, 10227605, 16364168, 20455210, 40910420, 81820840]

約数ペア:

[(1, 81820840), (2, 40910420), (4, 20455210), (5, 16364168), (8, 10227605), (10, 8182084), (19, 4306360), (20, 4091042), (38, 2153180), (40, 2045521), (76, 1076590), (95, 861272), (152, 538295), (190, 430636), (199, 411160), (380, 215318), (398, 205580), (541, 151240), (760, 107659), (796, 102790), (995, 82232), (1082, 75620), (1592, 51395), (1990, 41116), (2164, 37810), (2705, 30248), (3781, 21640), (3980, 20558), (4328, 18905), (5410, 15124), (7562, 10820), (7960, 10279)]