19216990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{83}}^1\times {\mathrm{137}}^1$

素因数の和:253

約数の個数: 48

約数和(自身を含む): 38184048

約数和(自身を除く): 18967058

約数列:

[1, 2, 5, 10, 13, 26, 65, 83, 130, 137, 166, 169, 274, 338, 415, 685, 830, 845, 1079, 1370, 1690, 1781, 2158, 3562, 5395, 8905, 10790, 11371, 14027, 17810, 22742, 23153, 28054, 46306, 56855, 70135, 113710, 115765, 140270, 147823, 231530, 295646, 739115, 1478230, 1921699, 3843398, 9608495, 19216990]

約数ペア:

[(1, 19216990), (2, 9608495), (5, 3843398), (10, 1921699), (13, 1478230), (26, 739115), (65, 295646), (83, 231530), (130, 147823), (137, 140270), (166, 115765), (169, 113710), (274, 70135), (338, 56855), (415, 46306), (685, 28054), (830, 23153), (845, 22742), (1079, 17810), (1370, 14027), (1690, 11371), (1781, 10790), (2158, 8905), (3562, 5395)]