21578778

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{521}}^1$

素因数の和:604

約数の個数: 64

約数和(自身を含む): 52617600

約数和(自身を除く): 31038822

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 59, 78, 117, 118, 177, 234, 351, 354, 521, 531, 702, 767, 1042, 1062, 1534, 1563, 1593, 2301, 3126, 3186, 4602, 4689, 6773, 6903, 9378, 13546, 13806, 14067, 20319, 20709, 28134, 30739, 40638, 41418, 60957, 61478, 92217, 121914, 182871, 184434, 276651, 365742, 399607, 553302, 799214, 829953, 1198821, 1659906, 2397642, 3596463, 7192926, 10789389, 21578778]

約数ペア:

[(1, 21578778), (2, 10789389), (3, 7192926), (6, 3596463), (9, 2397642), (13, 1659906), (18, 1198821), (26, 829953), (27, 799214), (39, 553302), (54, 399607), (59, 365742), (78, 276651), (117, 184434), (118, 182871), (177, 121914), (234, 92217), (351, 61478), (354, 60957), (521, 41418), (531, 40638), (702, 30739), (767, 28134), (1042, 20709), (1062, 20319), (1534, 14067), (1563, 13806), (1593, 13546), (2301, 9378), (3126, 6903), (3186, 6773), (4602, 4689)]