20443780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{907}}^1$

素因数の和:953

約数の個数: 72

約数和(自身を含む): 52170048

約数和(自身を除く): 31726268

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 230, 245, 322, 460, 490, 644, 805, 907, 980, 1127, 1610, 1814, 2254, 3220, 3628, 4508, 4535, 5635, 6349, 9070, 11270, 12698, 18140, 20861, 22540, 25396, 31745, 41722, 44443, 63490, 83444, 88886, 104305, 126980, 146027, 177772, 208610, 222215, 292054, 417220, 444430, 584108, 730135, 888860, 1022189, 1460270, 2044378, 2920540, 4088756, 5110945, 10221890, 20443780]

約数ペア:

[(1, 20443780), (2, 10221890), (4, 5110945), (5, 4088756), (7, 2920540), (10, 2044378), (14, 1460270), (20, 1022189), (23, 888860), (28, 730135), (35, 584108), (46, 444430), (49, 417220), (70, 292054), (92, 222215), (98, 208610), (115, 177772), (140, 146027), (161, 126980), (196, 104305), (230, 88886), (245, 83444), (322, 63490), (460, 44443), (490, 41722), (644, 31745), (805, 25396), (907, 22540), (980, 20861), (1127, 18140), (1610, 12698), (1814, 11270), (2254, 9070), (3220, 6349), (3628, 5635), (4508, 4535)]