21287266

素因数分解:

$2^1\times 7^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1$

素因数の和:85

約数の個数: 80

約数和(自身を含む): 45174528

約数和(自身を除く): 23887262

約数列:

[1, 2, 7, 11, 13, 14, 22, 26, 31, 49, 62, 77, 91, 98, 143, 154, 182, 217, 286, 341, 343, 403, 434, 539, 637, 682, 686, 806, 1001, 1078, 1274, 1519, 2002, 2387, 2401, 2821, 3038, 3773, 4433, 4459, 4774, 4802, 5642, 7007, 7546, 8866, 8918, 10633, 14014, 16709, 19747, 21266, 26411, 31031, 31213, 33418, 39494, 49049, 52822, 62062, 62426, 74431, 98098, 116963, 138229, 148862, 217217, 233926, 276458, 343343, 434434, 686686, 818741, 967603, 1520519, 1637482, 1935206, 3041038, 10643633, 21287266]

約数ペア:

[(1, 21287266), (2, 10643633), (7, 3041038), (11, 1935206), (13, 1637482), (14, 1520519), (22, 967603), (26, 818741), (31, 686686), (49, 434434), (62, 343343), (77, 276458), (91, 233926), (98, 217217), (143, 148862), (154, 138229), (182, 116963), (217, 98098), (286, 74431), (341, 62426), (343, 62062), (403, 52822), (434, 49049), (539, 39494), (637, 33418), (682, 31213), (686, 31031), (806, 26411), (1001, 21266), (1078, 19747), (1274, 16709), (1519, 14014), (2002, 10633), (2387, 8918), (2401, 8866), (2821, 7546), (3038, 7007), (3773, 5642), (4433, 4802), (4459, 4774)]