19980455

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{3527}}^1$

素因数の和:3646

約数の個数: 16

約数和(自身を含む): 26417664

約数和(自身を除く): 6437209

約数列:

[1, 5, 11, 55, 103, 515, 1133, 3527, 5665, 17635, 38797, 193985, 363281, 1816405, 3996091, 19980455]

約数ペア:

[(1, 19980455), (5, 3996091), (11, 1816405), (55, 363281), (103, 193985), (515, 38797), (1133, 17635), (3527, 5665)]