21295378

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{239}}^1$

素因数の和:426

約数の個数: 32

約数和(自身を含む): 36288000

約数和(自身を除く): 14992622

約数列:

[1, 2, 13, 23, 26, 46, 149, 239, 298, 299, 478, 598, 1937, 3107, 3427, 3874, 5497, 6214, 6854, 10994, 35611, 44551, 71222, 71461, 89102, 142922, 462943, 819053, 925886, 1638106, 10647689, 21295378]

約数ペア:

[(1, 21295378), (2, 10647689), (13, 1638106), (23, 925886), (26, 819053), (46, 462943), (149, 142922), (239, 89102), (298, 71461), (299, 71222), (478, 44551), (598, 35611), (1937, 10994), (3107, 6854), (3427, 6214), (3874, 5497)]