81177980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:255

約数の個数: 96

約数和(自身を含む): 192798144

約数和(自身を除く): 111620164

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 53, 65, 86, 106, 130, 137, 172, 212, 215, 260, 265, 274, 430, 530, 548, 559, 685, 689, 860, 1060, 1118, 1370, 1378, 1781, 2236, 2279, 2740, 2756, 2795, 3445, 3562, 4558, 5590, 5891, 6890, 7124, 7261, 8905, 9116, 11180, 11395, 11782, 13780, 14522, 17810, 22790, 23564, 29044, 29455, 29627, 35620, 36305, 45580, 58910, 59254, 72610, 76583, 94393, 117820, 118508, 145220, 148135, 153166, 188786, 296270, 306332, 312223, 377572, 382915, 471965, 592540, 624446, 765830, 943930, 1248892, 1531660, 1561115, 1887860, 3122230, 4058899, 6244460, 8117798, 16235596, 20294495, 40588990, 81177980]

約数ペア:

[(1, 81177980), (2, 40588990), (4, 20294495), (5, 16235596), (10, 8117798), (13, 6244460), (20, 4058899), (26, 3122230), (43, 1887860), (52, 1561115), (53, 1531660), (65, 1248892), (86, 943930), (106, 765830), (130, 624446), (137, 592540), (172, 471965), (212, 382915), (215, 377572), (260, 312223), (265, 306332), (274, 296270), (430, 188786), (530, 153166), (548, 148135), (559, 145220), (685, 118508), (689, 117820), (860, 94393), (1060, 76583), (1118, 72610), (1370, 59254), (1378, 58910), (1781, 45580), (2236, 36305), (2279, 35620), (2740, 29627), (2756, 29455), (2795, 29044), (3445, 23564), (3562, 22790), (4558, 17810), (5590, 14522), (5891, 13780), (6890, 11782), (7124, 11395), (7261, 11180), (8905, 9116)]