18978440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{36497}}^1$

素因数の和:36521

約数の個数: 32

約数和(自身を含む): 45987480

約数和(自身を除く): 27009040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 36497, 72994, 145988, 182485, 291976, 364970, 474461, 729940, 948922, 1459880, 1897844, 2372305, 3795688, 4744610, 9489220, 18978440]

約数ペア:

[(1, 18978440), (2, 9489220), (4, 4744610), (5, 3795688), (8, 2372305), (10, 1897844), (13, 1459880), (20, 948922), (26, 729940), (40, 474461), (52, 364970), (65, 291976), (104, 182485), (130, 145988), (260, 72994), (520, 36497)]