28205709

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{317}}^1$

素因数の和:569

約数の個数: 32

約数和(自身を含む): 45588480

約数和(自身を除く): 17382771

約数列:

[1, 3, 7, 19, 21, 57, 133, 223, 317, 399, 669, 951, 1561, 2219, 4237, 4683, 6023, 6657, 12711, 18069, 29659, 42161, 70691, 88977, 126483, 212073, 494837, 1343129, 1484511, 4029387, 9401903, 28205709]

約数ペア:

[(1, 28205709), (3, 9401903), (7, 4029387), (19, 1484511), (21, 1343129), (57, 494837), (133, 212073), (223, 126483), (317, 88977), (399, 70691), (669, 42161), (951, 29659), (1561, 18069), (2219, 12711), (4237, 6657), (4683, 6023)]