18519921

素因数分解:

$3^4\times 7^1\times {\mathrm{89}}^1\times {\mathrm{367}}^1$

素因数の和:475

約数の個数: 40

約数和(自身を含む): 32060160

約数和(自身を除く): 13540239

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 89, 189, 267, 367, 567, 623, 801, 1101, 1869, 2403, 2569, 3303, 5607, 7209, 7707, 9909, 16821, 23121, 29727, 32663, 50463, 69363, 97989, 208089, 228641, 293967, 685923, 881901, 2057769, 2645703, 6173307, 18519921]

約数ペア:

[(1, 18519921), (3, 6173307), (7, 2645703), (9, 2057769), (21, 881901), (27, 685923), (63, 293967), (81, 228641), (89, 208089), (189, 97989), (267, 69363), (367, 50463), (567, 32663), (623, 29727), (801, 23121), (1101, 16821), (1869, 9909), (2403, 7707), (2569, 7209), (3303, 5607)]