21150705

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1579}}^1$

素因数の和:1653

約数の個数: 32

約数和(自身を含む): 36403200

約数和(自身を除く): 15252495

約数列:

[1, 3, 5, 15, 19, 47, 57, 95, 141, 235, 285, 705, 893, 1579, 2679, 4465, 4737, 7895, 13395, 23685, 30001, 74213, 90003, 150005, 222639, 371065, 450015, 1113195, 1410047, 4230141, 7050235, 21150705]

約数ペア:

[(1, 21150705), (3, 7050235), (5, 4230141), (15, 1410047), (19, 1113195), (47, 450015), (57, 371065), (95, 222639), (141, 150005), (235, 90003), (285, 74213), (705, 30001), (893, 23685), (1579, 13395), (2679, 7895), (4465, 4737)]