20837960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{3643}}^1$

素因数の和:3678

約数の個数: 64

約数和(自身を含む): 55097280

約数和(自身を除く): 34259320

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 20, 22, 26, 40, 44, 52, 55, 65, 88, 104, 110, 130, 143, 220, 260, 286, 440, 520, 572, 715, 1144, 1430, 2860, 3643, 5720, 7286, 14572, 18215, 29144, 36430, 40073, 47359, 72860, 80146, 94718, 145720, 160292, 189436, 200365, 236795, 320584, 378872, 400730, 473590, 520949, 801460, 947180, 1041898, 1602920, 1894360, 2083796, 2604745, 4167592, 5209490, 10418980, 20837960]

約数ペア:

[(1, 20837960), (2, 10418980), (4, 5209490), (5, 4167592), (8, 2604745), (10, 2083796), (11, 1894360), (13, 1602920), (20, 1041898), (22, 947180), (26, 801460), (40, 520949), (44, 473590), (52, 400730), (55, 378872), (65, 320584), (88, 236795), (104, 200365), (110, 189436), (130, 160292), (143, 145720), (220, 94718), (260, 80146), (286, 72860), (440, 47359), (520, 40073), (572, 36430), (715, 29144), (1144, 18215), (1430, 14572), (2860, 7286), (3643, 5720)]