20761545

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{601}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 39529728

約数和(自身を除く): 18768183

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 49, 105, 141, 147, 235, 245, 329, 601, 705, 735, 987, 1645, 1803, 2303, 3005, 4207, 4935, 6909, 9015, 11515, 12621, 21035, 28247, 29449, 34545, 63105, 84741, 88347, 141235, 147245, 197729, 423705, 441735, 593187, 988645, 1384103, 2965935, 4152309, 6920515, 20761545]

約数ペア:

[(1, 20761545), (3, 6920515), (5, 4152309), (7, 2965935), (15, 1384103), (21, 988645), (35, 593187), (47, 441735), (49, 423705), (105, 197729), (141, 147245), (147, 141235), (235, 88347), (245, 84741), (329, 63105), (601, 34545), (705, 29449), (735, 28247), (987, 21035), (1645, 12621), (1803, 11515), (2303, 9015), (3005, 6909), (4207, 4935)]