21520407

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{277}}^1$

素因数の和:375

約数の個数: 32

約数和(自身を含む): 32025600

約数和(自身を除く): 10505193

約数列:

[1, 3, 19, 29, 47, 57, 87, 141, 277, 551, 831, 893, 1363, 1653, 2679, 4089, 5263, 8033, 13019, 15789, 24099, 25897, 39057, 77691, 152627, 247361, 377551, 457881, 742083, 1132653, 7173469, 21520407]

約数ペア:

[(1, 21520407), (3, 7173469), (19, 1132653), (29, 742083), (47, 457881), (57, 377551), (87, 247361), (141, 152627), (277, 77691), (551, 39057), (831, 25897), (893, 24099), (1363, 15789), (1653, 13019), (2679, 8033), (4089, 5263)]