20199920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19423}}^1$

素因数の和:19449

約数の個数: 40

約数和(自身を含む): 50580096

約数和(自身を除く): 30380176

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 19423, 38846, 77692, 97115, 155384, 194230, 252499, 310768, 388460, 504998, 776920, 1009996, 1262495, 1553840, 2019992, 2524990, 4039984, 5049980, 10099960, 20199920]

約数ペア:

[(1, 20199920), (2, 10099960), (4, 5049980), (5, 4039984), (8, 2524990), (10, 2019992), (13, 1553840), (16, 1262495), (20, 1009996), (26, 776920), (40, 504998), (52, 388460), (65, 310768), (80, 252499), (104, 194230), (130, 155384), (208, 97115), (260, 77692), (520, 38846), (1040, 19423)]