28781109

素因数分解:

$3^3\times 7^1\times {\mathrm{197}}^1\times {\mathrm{773}}^1$

素因数の和:986

約数の個数: 32

約数和(自身を含む): 49040640

約数和(自身を除く): 20259531

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 197, 591, 773, 1379, 1773, 2319, 4137, 5319, 5411, 6957, 12411, 16233, 20871, 37233, 48699, 146097, 152281, 456843, 1065967, 1370529, 3197901, 4111587, 9593703, 28781109]

約数ペア:

[(1, 28781109), (3, 9593703), (7, 4111587), (9, 3197901), (21, 1370529), (27, 1065967), (63, 456843), (189, 152281), (197, 146097), (591, 48699), (773, 37233), (1379, 20871), (1773, 16233), (2319, 12411), (4137, 6957), (5319, 5411)]