21392385

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{10723}}^1$

素因数の和:10757

約数の個数: 32

約数和(自身を含む): 41180160

約数和(自身を除く): 19787775

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995, 10723, 32169, 53615, 75061, 160845, 203737, 225183, 375305, 611211, 1018685, 1125915, 1426159, 3056055, 4278477, 7130795, 21392385]

約数ペア:

[(1, 21392385), (3, 7130795), (5, 4278477), (7, 3056055), (15, 1426159), (19, 1125915), (21, 1018685), (35, 611211), (57, 375305), (95, 225183), (105, 203737), (133, 160845), (285, 75061), (399, 53615), (665, 32169), (1995, 10723)]