21173139

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:196

約数の個数: 48

約数和(自身を含む): 34801312

約数和(自身を除く): 13628173

約数列:

[1, 3, 9, 13, 37, 39, 67, 73, 111, 117, 201, 219, 333, 481, 603, 657, 871, 949, 1443, 2479, 2613, 2701, 2847, 4329, 4891, 7437, 7839, 8103, 8541, 14673, 22311, 24309, 32227, 35113, 44019, 63583, 96681, 105339, 180967, 190749, 290043, 316017, 542901, 572247, 1628703, 2352571, 7057713, 21173139]

約数ペア:

[(1, 21173139), (3, 7057713), (9, 2352571), (13, 1628703), (37, 572247), (39, 542901), (67, 316017), (73, 290043), (111, 190749), (117, 180967), (201, 105339), (219, 96681), (333, 63583), (481, 44019), (603, 35113), (657, 32227), (871, 24309), (949, 22311), (1443, 14673), (2479, 8541), (2613, 8103), (2701, 7839), (2847, 7437), (4329, 4891)]