81306920

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{119569}}^1$

素因数の和:119597

約数の個数: 32

約数和(自身を含む): 193703400

約数和(自身を除く): 112396480

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 119569, 239138, 478276, 597845, 956552, 1195690, 2032673, 2391380, 4065346, 4782760, 8130692, 10163365, 16261384, 20326730, 40653460, 81306920]

約数ペア:

[(1, 81306920), (2, 40653460), (4, 20326730), (5, 16261384), (8, 10163365), (10, 8130692), (17, 4782760), (20, 4065346), (34, 2391380), (40, 2032673), (68, 1195690), (85, 956552), (136, 597845), (170, 478276), (340, 239138), (680, 119569)]