21881559

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{317}}^1$

素因数の和:519

約数の個数: 32

約数和(自身を含む): 35412480

約数和(自身を除く): 13530921

約数列:

[1, 3, 7, 19, 21, 57, 133, 173, 317, 399, 519, 951, 1211, 2219, 3287, 3633, 6023, 6657, 9861, 18069, 23009, 42161, 54841, 69027, 126483, 164523, 383887, 1041979, 1151661, 3125937, 7293853, 21881559]

約数ペア:

[(1, 21881559), (3, 7293853), (7, 3125937), (19, 1151661), (21, 1041979), (57, 383887), (133, 164523), (173, 126483), (317, 69027), (399, 54841), (519, 42161), (951, 23009), (1211, 18069), (2219, 9861), (3287, 6657), (3633, 6023)]