81331120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78203}}^1$

素因数の和:78229

約数の個数: 40

約数和(自身を含む): 203643216

約数和(自身を除く): 122312096

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 78203, 156406, 312812, 391015, 625624, 782030, 1016639, 1251248, 1564060, 2033278, 3128120, 4066556, 5083195, 6256240, 8133112, 10166390, 16266224, 20332780, 40665560, 81331120]

約数ペア:

[(1, 81331120), (2, 40665560), (4, 20332780), (5, 16266224), (8, 10166390), (10, 8133112), (13, 6256240), (16, 5083195), (20, 4066556), (26, 3128120), (40, 2033278), (52, 1564060), (65, 1251248), (80, 1016639), (104, 782030), (130, 625624), (208, 391015), (260, 312812), (520, 156406), (1040, 78203)]