21697905

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{4007}}^1$

素因数の和:4053

約数の個数: 24

約数和(自身を含む): 36649152

約数和(自身を除く): 14951247

約数列:

[1, 3, 5, 15, 19, 57, 95, 285, 361, 1083, 1805, 4007, 5415, 12021, 20035, 60105, 76133, 228399, 380665, 1141995, 1446527, 4339581, 7232635, 21697905]

約数ペア:

[(1, 21697905), (3, 7232635), (5, 4339581), (15, 1446527), (19, 1141995), (57, 380665), (95, 228399), (285, 76133), (361, 60105), (1083, 20035), (1805, 12021), (4007, 5415)]