81405948

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^2\times {\mathrm{137}}^1\times {\mathrm{293}}^1$

素因数の和:463

約数の個数: 72

約数和(自身を含む): 207890928

約数和(自身を除く): 126484980

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 137, 156, 169, 274, 293, 338, 411, 507, 548, 586, 676, 822, 879, 1014, 1172, 1644, 1758, 1781, 2028, 3516, 3562, 3809, 5343, 7124, 7618, 10686, 11427, 15236, 21372, 22854, 23153, 40141, 45708, 46306, 49517, 69459, 80282, 92612, 99034, 120423, 138918, 148551, 160564, 198068, 240846, 277836, 297102, 481692, 521833, 594204, 1043666, 1565499, 2087332, 3130998, 6261996, 6783829, 13567658, 20351487, 27135316, 40702974, 81405948]

約数ペア:

[(1, 81405948), (2, 40702974), (3, 27135316), (4, 20351487), (6, 13567658), (12, 6783829), (13, 6261996), (26, 3130998), (39, 2087332), (52, 1565499), (78, 1043666), (137, 594204), (156, 521833), (169, 481692), (274, 297102), (293, 277836), (338, 240846), (411, 198068), (507, 160564), (548, 148551), (586, 138918), (676, 120423), (822, 99034), (879, 92612), (1014, 80282), (1172, 69459), (1644, 49517), (1758, 46306), (1781, 45708), (2028, 40141), (3516, 23153), (3562, 22854), (3809, 21372), (5343, 15236), (7124, 11427), (7618, 10686)]