128428040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{257}}^1$

素因数の和:343

約数の個数: 96

約数和(自身を含む): 322804440

約数和(自身を除く): 194376400

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 257, 260, 310, 403, 514, 520, 620, 806, 961, 1028, 1240, 1285, 1612, 1922, 2015, 2056, 2570, 3224, 3341, 3844, 4030, 4805, 5140, 6682, 7688, 7967, 8060, 9610, 10280, 12493, 13364, 15934, 16120, 16705, 19220, 24986, 26728, 31868, 33410, 38440, 39835, 49972, 62465, 63736, 66820, 79670, 99944, 103571, 124930, 133640, 159340, 207142, 246977, 249860, 318680, 414284, 493954, 499720, 517855, 828568, 987908, 1035710, 1234885, 1975816, 2071420, 2469770, 3210701, 4142840, 4939540, 6421402, 9879080, 12842804, 16053505, 25685608, 32107010, 64214020, 128428040]

約数ペア:

[(1, 128428040), (2, 64214020), (4, 32107010), (5, 25685608), (8, 16053505), (10, 12842804), (13, 9879080), (20, 6421402), (26, 4939540), (31, 4142840), (40, 3210701), (52, 2469770), (62, 2071420), (65, 1975816), (104, 1234885), (124, 1035710), (130, 987908), (155, 828568), (248, 517855), (257, 499720), (260, 493954), (310, 414284), (403, 318680), (514, 249860), (520, 246977), (620, 207142), (806, 159340), (961, 133640), (1028, 124930), (1240, 103571), (1285, 99944), (1612, 79670), (1922, 66820), (2015, 63736), (2056, 62465), (2570, 49972), (3224, 39835), (3341, 38440), (3844, 33410), (4030, 31868), (4805, 26728), (5140, 24986), (6682, 19220), (7688, 16705), (7967, 16120), (8060, 15934), (9610, 13364), (10280, 12493)]