21639688

素因数分解:

$2^3\times 7^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{317}}^1$

素因数の和:406

約数の個数: 64

約数和(自身を含む): 49455360

約数和(自身を除く): 27815672

約数列:

[1, 2, 4, 7, 8, 14, 23, 28, 46, 53, 56, 92, 106, 161, 184, 212, 317, 322, 371, 424, 634, 644, 742, 1219, 1268, 1288, 1484, 2219, 2438, 2536, 2968, 4438, 4876, 7291, 8533, 8876, 9752, 14582, 16801, 17066, 17752, 29164, 33602, 34132, 51037, 58328, 67204, 68264, 102074, 117607, 134408, 204148, 235214, 386423, 408296, 470428, 772846, 940856, 1545692, 2704961, 3091384, 5409922, 10819844, 21639688]

約数ペア:

[(1, 21639688), (2, 10819844), (4, 5409922), (7, 3091384), (8, 2704961), (14, 1545692), (23, 940856), (28, 772846), (46, 470428), (53, 408296), (56, 386423), (92, 235214), (106, 204148), (161, 134408), (184, 117607), (212, 102074), (317, 68264), (322, 67204), (371, 58328), (424, 51037), (634, 34132), (644, 33602), (742, 29164), (1219, 17752), (1268, 17066), (1288, 16801), (1484, 14582), (2219, 9752), (2438, 8876), (2536, 8533), (2968, 7291), (4438, 4876)]