81357978

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{191}}^1$

素因数の和:379

約数の個数: 64

約数和(自身を含む): 181665792

約数和(自身を除く): 100307814

約数列:

[1, 2, 3, 6, 13, 26, 39, 43, 78, 86, 127, 129, 191, 254, 258, 381, 382, 559, 573, 762, 1118, 1146, 1651, 1677, 2483, 3302, 3354, 4953, 4966, 5461, 7449, 8213, 9906, 10922, 14898, 16383, 16426, 24257, 24639, 32766, 48514, 49278, 70993, 72771, 106769, 141986, 145542, 212979, 213538, 315341, 320307, 425958, 630682, 640614, 946023, 1043051, 1892046, 2086102, 3129153, 6258306, 13559663, 27119326, 40678989, 81357978]

約数ペア:

[(1, 81357978), (2, 40678989), (3, 27119326), (6, 13559663), (13, 6258306), (26, 3129153), (39, 2086102), (43, 1892046), (78, 1043051), (86, 946023), (127, 640614), (129, 630682), (191, 425958), (254, 320307), (258, 315341), (381, 213538), (382, 212979), (559, 145542), (573, 141986), (762, 106769), (1118, 72771), (1146, 70993), (1651, 49278), (1677, 48514), (2483, 32766), (3302, 24639), (3354, 24257), (4953, 16426), (4966, 16383), (5461, 14898), (7449, 10922), (8213, 9906)]