21787370

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{191}}^1$

素因数の和:287

約数の個数: 64

約数和(自身を含む): 46282752

約数和(自身を除く): 24495382

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 55, 61, 85, 110, 122, 170, 187, 191, 305, 374, 382, 610, 671, 935, 955, 1037, 1342, 1870, 1910, 2074, 2101, 3247, 3355, 4202, 5185, 6494, 6710, 10370, 10505, 11407, 11651, 16235, 21010, 22814, 23302, 32470, 35717, 57035, 58255, 71434, 114070, 116510, 128161, 178585, 198067, 256322, 357170, 396134, 640805, 990335, 1281610, 1980670, 2178737, 4357474, 10893685, 21787370]

約数ペア:

[(1, 21787370), (2, 10893685), (5, 4357474), (10, 2178737), (11, 1980670), (17, 1281610), (22, 990335), (34, 640805), (55, 396134), (61, 357170), (85, 256322), (110, 198067), (122, 178585), (170, 128161), (187, 116510), (191, 114070), (305, 71434), (374, 58255), (382, 57035), (610, 35717), (671, 32470), (935, 23302), (955, 22814), (1037, 21010), (1342, 16235), (1870, 11651), (1910, 11407), (2074, 10505), (2101, 10370), (3247, 6710), (3355, 6494), (4202, 5185)]