21650090

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{907}}^1$

素因数の和:963

約数の個数: 64

約数和(自身を含む): 50208768

約数和(自身を除く): 28558678

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 31, 35, 55, 62, 70, 77, 110, 154, 155, 217, 310, 341, 385, 434, 682, 770, 907, 1085, 1705, 1814, 2170, 2387, 3410, 4535, 4774, 6349, 9070, 9977, 11935, 12698, 19954, 23870, 28117, 31745, 49885, 56234, 63490, 69839, 99770, 139678, 140585, 196819, 281170, 309287, 349195, 393638, 618574, 698390, 984095, 1546435, 1968190, 2165009, 3092870, 4330018, 10825045, 21650090]

約数ペア:

[(1, 21650090), (2, 10825045), (5, 4330018), (7, 3092870), (10, 2165009), (11, 1968190), (14, 1546435), (22, 984095), (31, 698390), (35, 618574), (55, 393638), (62, 349195), (70, 309287), (77, 281170), (110, 196819), (154, 140585), (155, 139678), (217, 99770), (310, 69839), (341, 63490), (385, 56234), (434, 49885), (682, 31745), (770, 28117), (907, 23870), (1085, 19954), (1705, 12698), (1814, 11935), (2170, 9977), (2387, 9070), (3410, 6349), (4535, 4774)]