21151605

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{1657}}^1$

素因数の和:1725

約数の個数: 32

約数和(自身を含む): 36290304

約数和(自身を除く): 15138699

約数列:

[1, 3, 5, 15, 23, 37, 69, 111, 115, 185, 345, 555, 851, 1657, 2553, 4255, 4971, 8285, 12765, 24855, 38111, 61309, 114333, 183927, 190555, 306545, 571665, 919635, 1410107, 4230321, 7050535, 21151605]

約数ペア:

[(1, 21151605), (3, 7050535), (5, 4230321), (15, 1410107), (23, 919635), (37, 571665), (69, 306545), (111, 190555), (115, 183927), (185, 114333), (345, 61309), (555, 38111), (851, 24855), (1657, 12765), (2553, 8285), (4255, 4971)]