21065018.000000000

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{273001}}^1$

素因数の和:273024

約数の個数: 36

約数和(自身を含む): 347804548

約数和(自身を除く): 220040080

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 156, 234, 468, 273001, 546002, 819003, 1092004, 1638006, 2457009, 3276012, 3549013, 4914018, 7098026, 9828036, 10647039, 14196052, 21294078, 31941117, 42588156, 63882234, 127764468]

約数ペア:

[(1, 127764468), (2, 63882234), (3, 42588156), (4, 31941117), (6, 21294078), (9, 14196052), (12, 10647039), (13, 9828036), (18, 7098026), (26, 4914018), (36, 3549013), (39, 3276012), (52, 2457009), (78, 1638006), (117, 1092004), (156, 819003), (234, 546002), (468, 273001)]