20000820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{6803}}^1$

素因数の和:6829

約数の個数: 72

約数和(自身を含む): 65155104

約数和(自身を除く): 45154284

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 6803, 13606, 20409, 27212, 34015, 40818, 47621, 68030, 81636, 95242, 102045, 136060, 142863, 190484, 204090, 238105, 285726, 333347, 408180, 476210, 571452, 666694, 714315, 952420, 1000041, 1333388, 1428630, 1666735, 2000082, 2857260, 3333470, 4000164, 5000205, 6666940, 10000410, 20000820]

約数ペア:

[(1, 20000820), (2, 10000410), (3, 6666940), (4, 5000205), (5, 4000164), (6, 3333470), (7, 2857260), (10, 2000082), (12, 1666735), (14, 1428630), (15, 1333388), (20, 1000041), (21, 952420), (28, 714315), (30, 666694), (35, 571452), (42, 476210), (49, 408180), (60, 333347), (70, 285726), (84, 238105), (98, 204090), (105, 190484), (140, 142863), (147, 136060), (196, 102045), (210, 95242), (245, 81636), (294, 68030), (420, 47621), (490, 40818), (588, 34015), (735, 27212), (980, 20409), (1470, 13606), (2940, 6803)]