21165963

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:156

約数の個数: 64

約数和(自身を含む): 37330944

約数和(自身を除く): 16164981

約数列:

[1, 3, 7, 13, 21, 31, 39, 41, 61, 91, 93, 123, 183, 217, 273, 287, 403, 427, 533, 651, 793, 861, 1209, 1271, 1281, 1599, 1891, 2379, 2501, 2821, 3731, 3813, 5551, 5673, 7503, 8463, 8897, 11193, 13237, 16523, 16653, 17507, 24583, 26691, 32513, 39711, 49569, 52521, 73749, 77531, 97539, 115661, 172081, 227591, 232593, 346983, 516243, 542717, 682773, 1007903, 1628151, 3023709, 7055321, 21165963]

約数ペア:

[(1, 21165963), (3, 7055321), (7, 3023709), (13, 1628151), (21, 1007903), (31, 682773), (39, 542717), (41, 516243), (61, 346983), (91, 232593), (93, 227591), (123, 172081), (183, 115661), (217, 97539), (273, 77531), (287, 73749), (403, 52521), (427, 49569), (533, 39711), (651, 32513), (793, 26691), (861, 24583), (1209, 17507), (1271, 16653), (1281, 16523), (1599, 13237), (1891, 11193), (2379, 8897), (2501, 8463), (2821, 7503), (3731, 5673), (3813, 5551)]