20403978

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{41}}^2$

素因数の和:128

約数の個数: 72

約数和(自身を含む): 50780256

約数和(自身を除く): 30376278

約数列:

[1, 2, 3, 6, 7, 14, 17, 21, 34, 41, 42, 51, 82, 102, 119, 123, 238, 246, 287, 289, 357, 574, 578, 697, 714, 861, 867, 1394, 1681, 1722, 1734, 2023, 2091, 3362, 4046, 4182, 4879, 5043, 6069, 9758, 10086, 11767, 11849, 12138, 14637, 23534, 23698, 28577, 29274, 35301, 35547, 57154, 70602, 71094, 82943, 85731, 165886, 171462, 200039, 248829, 400078, 485809, 497658, 600117, 971618, 1200234, 1457427, 2914854, 3400663, 6801326, 10201989, 20403978]

約数ペア:

[(1, 20403978), (2, 10201989), (3, 6801326), (6, 3400663), (7, 2914854), (14, 1457427), (17, 1200234), (21, 971618), (34, 600117), (41, 497658), (42, 485809), (51, 400078), (82, 248829), (102, 200039), (119, 171462), (123, 165886), (238, 85731), (246, 82943), (287, 71094), (289, 70602), (357, 57154), (574, 35547), (578, 35301), (697, 29274), (714, 28577), (861, 23698), (867, 23534), (1394, 14637), (1681, 12138), (1722, 11849), (1734, 11767), (2023, 10086), (2091, 9758), (3362, 6069), (4046, 5043), (4182, 4879)]