21729405

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{571}}^1$

素因数の和:681

約数の個数: 32

約数和(自身を含む): 36241920

約数和(自身を除く): 14512515

約数列:

[1, 3, 5, 15, 43, 59, 129, 177, 215, 295, 571, 645, 885, 1713, 2537, 2855, 7611, 8565, 12685, 24553, 33689, 38055, 73659, 101067, 122765, 168445, 368295, 505335, 1448627, 4345881, 7243135, 21729405]

約数ペア:

[(1, 21729405), (3, 7243135), (5, 4345881), (15, 1448627), (43, 505335), (59, 368295), (129, 168445), (177, 122765), (215, 101067), (295, 73659), (571, 38055), (645, 33689), (885, 24553), (1713, 12685), (2537, 8565), (2855, 7611)]