21436779

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1$

素因数の和:220

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 17270421

約数列:

[1, 3, 7, 13, 17, 21, 31, 39, 51, 91, 93, 119, 149, 217, 221, 273, 357, 403, 447, 527, 651, 663, 1043, 1209, 1547, 1581, 1937, 2533, 2821, 3129, 3689, 4619, 4641, 5811, 6851, 7599, 8463, 11067, 13559, 13857, 17731, 20553, 32333, 32929, 40677, 47957, 53193, 60047, 78523, 96999, 98787, 143871, 180141, 230503, 235569, 420329, 549661, 691509, 1020799, 1260987, 1648983, 3062397, 7145593, 21436779]

約数ペア:

[(1, 21436779), (3, 7145593), (7, 3062397), (13, 1648983), (17, 1260987), (21, 1020799), (31, 691509), (39, 549661), (51, 420329), (91, 235569), (93, 230503), (119, 180141), (149, 143871), (217, 98787), (221, 96999), (273, 78523), (357, 60047), (403, 53193), (447, 47957), (527, 40677), (651, 32929), (663, 32333), (1043, 20553), (1209, 17731), (1547, 13857), (1581, 13559), (1937, 11067), (2533, 8463), (2821, 7599), (3129, 6851), (3689, 5811), (4619, 4641)]