21900318

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:313

約数の個数: 64

約数和(自身を含む): 51321600

約数和(自身を除く): 29421282

約数列:

[1, 2, 3, 6, 11, 17, 22, 33, 34, 51, 66, 102, 131, 149, 187, 262, 298, 374, 393, 447, 561, 786, 894, 1122, 1441, 1639, 2227, 2533, 2882, 3278, 4323, 4454, 4917, 5066, 6681, 7599, 8646, 9834, 13362, 15198, 19519, 24497, 27863, 39038, 48994, 55726, 58557, 73491, 83589, 117114, 146982, 167178, 214709, 331823, 429418, 644127, 663646, 995469, 1288254, 1990938, 3650053, 7300106, 10950159, 21900318]

約数ペア:

[(1, 21900318), (2, 10950159), (3, 7300106), (6, 3650053), (11, 1990938), (17, 1288254), (22, 995469), (33, 663646), (34, 644127), (51, 429418), (66, 331823), (102, 214709), (131, 167178), (149, 146982), (187, 117114), (262, 83589), (298, 73491), (374, 58557), (393, 55726), (447, 48994), (561, 39038), (786, 27863), (894, 24497), (1122, 19519), (1441, 15198), (1639, 13362), (2227, 9834), (2533, 8646), (2882, 7599), (3278, 6681), (4323, 5066), (4454, 4917)]