21580990

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:181

約数の個数: 64

約数和(自身を含む): 43732224

約数和(自身を除く): 22151234

約数列:

[1, 2, 5, 10, 17, 34, 37, 47, 73, 74, 85, 94, 146, 170, 185, 235, 365, 370, 470, 629, 730, 799, 1241, 1258, 1598, 1739, 2482, 2701, 3145, 3431, 3478, 3995, 5402, 6205, 6290, 6862, 7990, 8695, 12410, 13505, 17155, 17390, 27010, 29563, 34310, 45917, 58327, 59126, 91834, 116654, 126947, 147815, 229585, 253894, 291635, 295630, 459170, 583270, 634735, 1269470, 2158099, 4316198, 10790495, 21580990]

約数ペア:

[(1, 21580990), (2, 10790495), (5, 4316198), (10, 2158099), (17, 1269470), (34, 634735), (37, 583270), (47, 459170), (73, 295630), (74, 291635), (85, 253894), (94, 229585), (146, 147815), (170, 126947), (185, 116654), (235, 91834), (365, 59126), (370, 58327), (470, 45917), (629, 34310), (730, 29563), (799, 27010), (1241, 17390), (1258, 17155), (1598, 13505), (1739, 12410), (2482, 8695), (2701, 7990), (3145, 6862), (3431, 6290), (3478, 6205), (3995, 5402)]