20747870

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{1319}}^1$

素因数の和:1361

約数の個数: 48

約数和(自身を含む): 44241120

約数和(自身を除く): 23493250

約数列:

[1, 2, 5, 10, 11, 13, 22, 26, 55, 65, 110, 121, 130, 143, 242, 286, 605, 715, 1210, 1319, 1430, 1573, 2638, 3146, 6595, 7865, 13190, 14509, 15730, 17147, 29018, 34294, 72545, 85735, 145090, 159599, 171470, 188617, 319198, 377234, 797995, 943085, 1595990, 1886170, 2074787, 4149574, 10373935, 20747870]

約数ペア:

[(1, 20747870), (2, 10373935), (5, 4149574), (10, 2074787), (11, 1886170), (13, 1595990), (22, 943085), (26, 797995), (55, 377234), (65, 319198), (110, 188617), (121, 171470), (130, 159599), (143, 145090), (242, 85735), (286, 72545), (605, 34294), (715, 29018), (1210, 17147), (1319, 15730), (1430, 14509), (1573, 13190), (2638, 7865), (3146, 6595)]